
229 U.S. 447 (1913)
CHARLTON
v.
KELLY, SHERIFF OF HUDSON COUNTY, NEW JERSEY.
No. 232.
Supreme Court of United States.
Argued April 18, 1913.
Decided June 10, 1913.
APPEAL FROM THE CIRCUIT COURT OF THE UNITED STATES FOR THE DISTRICT OF NEW JERSEY.
*451 Mr. R. Floyd Clarke, with whom Mr. William D. Edwards was on the brief, for appellant.
Mr. Pierre P. Garven for appellees.
*456 MR. JUSTICE LURTON, after making the foregoing statement, delivered the opinion of the court.
A writ of habeas corpus cannot be used as a writ of error. If Judge Blair had jurisdiction of the person of the accused and of the subject-matter, and had before him competent legal evidence of the commission of this crime with which the appellant was charged in the complaint, which, according to the law of New Jersey, would justify his apprehension and commitment for trial if the crime had been committed in that State, his decision may not be reviewed on habeas corpus. Terlinden v. Ames, 184 U.S. 270, 278; Bryant v. United States, 167 U.S. 104; McNamara v. Henkel, 226 U.S. 520.
By a stipulation filed in the case for the purpose of this review, it is agreed that the evidence presented to Judge Blair of the murder with which the accused was charged, and of his criminality was sufficient to meet the treaty and statutory requirements of the case, and the errors assigned in this court questioning its legality and competency, as well as those as to the alleged absence of a warrant or deposition upon which such warrant was issued, have been withdrawn. But neither this stipulation, nor the withdrawal of the assignments of error referred to is to affect any of the matters raised by other objections pointed out in other assignments.
The objections which are relied upon for the purpose of *457 defeating extradition may be conveniently summarized and considered under four heads:
1. That evidence of the insanity of the accused was offered and excluded.
2. That the evidence of a formal demand for the extradition of the accused was not filed until more than forty days after the arrest.
3. That appellant is a citizen of the United States, and that the treaty in providing for the extradition of "persons" accused of crime does not include persons who are citizens or subjects of the nation upon whom the demand is made.
4. That if the word "person" as used in the treaty includes citizens of the asylum country, the treaty, in so far as it covers that subject, has been abrogated by the conduct of Italy in refusing to deliver up its own citizens upon the demand of the United States, and by the enactment of a municipal law, since the treaty, forbidding the extradition of citizens.
We will consider these objections in their order:
1. Was evidence of insanity improperly excluded?
It must be conceded that impressive evidence of the insanity of the accused was offered by him and excluded. It is now said that this ruling was erroneous. But if so, this is not a writ of error and mere errors in the rejection of evidence are not subject to review by a writ of habeas corpus. Benson v. McMahon, 127 U.S. 457, 461; Terlinden v. Ames, 184 U.S. 270, 278; McNamara v. Henkel, supra. In the McNamara Case, certain depositions had been received for the prosecution over objection. This court said that there was legal evidence on which to base the action of the commissioner in holding the accused for extradition, irrespective of the depositions objected to.
But it is said that the act of August 3, 1882, 22 Statutes, *458 215, c. 378, § 3, requires that the defendant's witnesses shall be heard. That section is most inartificially drawn. It reads as follows:
"That on the hearing of any case under a claim of extradition by any foreign government, upon affidavit being filed by the person charged setting forth that there are witnesses whose evidence is material to his defense, that he cannot safely go to trial without them, what he expects to prove by each of them, and that he is not possessed of sufficient means, and is actually unable to pay the fees of such witnesses, the judge or commissioner before whom such claim for extradition is heard may order that such witnesses be subpoenaed; and in such cases the costs incurred by the process, and the fees of witnesses, shall be paid in the same manner that similar fees are paid in the case of witnesses subpoenaed in behalf of the United States."
The contention is that the effect of this provision is to give the accused the right to introduce any evidence which would be admissible upon a trial under an issue of not guilty. To this we cannot agree. The prime purpose of the section is to afford the defendant the means for obtaining the testimony of witnesses and to provide for their fees. In no sense does the statute make relevant, legal or competent evidence which would not have been competent before the statute upon such a hearing. True, the statute speaks of evidence "material for his defense, without which he cannot safely go to trial," but we cannot discover that Congress intended to depart from the provisions of Article I of the treaty which requires that a surrender shall be made "upon such evidence of criminality as, according to the laws of the place where the fugitive or person so charged shall be found, would justify his or her apprehension and commitment, if the crime had been there committed." The provision is common to many treaties, and Congress, by § 5270, Rev. Stat., has, in aid *459 of such treaties, prescribed the procedure upon such a hearing in these words:
"Whenever there is a treaty or convention for extradition between the Government of the United States and any foreign government, any justice of the Supreme Court, circuit judge, district judge, commissioner, authorized so to do by any of the courts of the United States, or judge of a court of record of general jurisdiction of any State, may, upon complaint made under oath, charging any person found within the limits of any State, district, or Territory, with having committed within the jurisdiction of any such foreign government any of the crimes provided for by such treaty or convention, issue his warrant for the apprehension of the person so charged, that he may be brought before such justice, judge, or commissioner, to the end that the evidence of criminality may be heard and considered. If, on such hearing, he deems the evidence sufficient to sustain the charge under the provisions of the proper treaty or convention, he shall certify the same, together with a copy of all the testimony taken before him, to the Secretary of State, that a warrant may issue upon the requisition of the proper authorities of such foreign government, for the surrender of such person, according to the stipulations of the treaty or convention; and he shall issue his warrant for the commitment of the person so charged to the proper jail, there to remain until such surrender shall be made."
Judge Blair made the certificate in form and substance in conformity with the statute, and upon the receipt of that, a warrant was duly issued for the surrender of the appellant to the agents of the Italian Government.
In Benson v. McMahon, supra (p. 462) this court said of a similar provision in the treaty with Mexico, in connection with Rev. Stat. § 5270
"Taking this provision of the treaty, and that of the Revised Statutes above recited, we are of opinion that *460 the proceeding before the commissioner is not to be regarded as in the nature of a final trial by which the prisoner could be convicted or acquitted of the crime charged against him, but rather of the character of those preliminary examinations, which take place every day in this country before an examining or committing magistrate for the purpose of determining whether a case is made out which will justify the holding of the accused, either by imprisonment or under bail, to ultimately answer to an indictment, or other proceeding, in which he shall be finally tried upon the charge made against him. The language of the treaty which we have cited, above quoted, explicitly provides that `the commission of the crime shall be so established as that the laws of the country in which the fugitive or the person so accused shall be found would justify his or her apprehension and commitment for trial if the crime had been there committed.' This prescribes the proceedings in these preliminary examinations as accurately as language can well do it. The act of Congress conferring jurisdiction upon the commissioner, or other examining officer, it may be noted in this connection, says that if he deems the evidence sufficient to sustain the charge under the provisions of the treaty he shall certify the same, together with a copy of all the testimony, and issue his warrant for the commitment of the person so charged.
"We are not sitting in this court on the trial of the prisoner, with power to pronounce him guilty and punish him or declare him innocent and acquit him. We are now engaged simply in an inquiry as to whether, under the construction of the act of Congress, and the treaty entered into between this country and Mexico, there was legal evidence before the commissioner to justify him in exercising his power to commit the person accused to custody to await the requisition of the Mexican government."
To repeat, the act of 1882 does not prescribe the extent *461 to which evidence thus obtained shall be admitted, and we quite agree with the view expressed by Judge Brown, in In re Wadge, 15 Fed. Rep. 864, who said (p. 866):
"The phrase in § 3 of the act of August 3, 1882 `that he, (the accused) cannot safely go to trial without them,' (witnesses,) cannot be construed as giving a right to a full trial in violation of treaty stipulations; but it must be confined to such a preliminary hearing only as was already allowable under the existing practice, viz, such as is appropriate to a hearing having reference only to a commitment for future trial."
There is not and cannot well be any uniform rule determining how far an examining magistrate should hear the witnesses produced by an accused person. The proceeding is not a trial. The issue is confined to the single question of whether the evidence for the State makes a prima facie case of guilt sufficient to make it proper to hold the party for trial. Such committing trials, if they may be called trials in any legal sense, are usually regulated by local statutes. Neither can the courts be expected to bring about uniformity of practice as to the right of such an accused person to have his witnesses examined, since if they are heard, that is the end of the matter, as the ruling cannot be reversed.
In this case the magistrate refused to hear evidence of insanity. It is claimed that because he excluded such evidence, the judgment committing appellant for extradition is to be set aside as a nullity, and the accused set at liberty. At most the exclusion was error not reviewable by habeas corpus. To have witnesses produced to contradict the testimony for the prosecution is obviously a very different thing from hearing witnesses for the purpose of explaining matters referred to by the witnesses for the Government. This distinction was taken by Mr. Justice Washington in the case of United States v. White, 2 Washington C.C. 29, when he said:
*462 "Generally speaking, the defendant's witnesses are not examined upon an application to bind him over to answer upon a criminal charge. The defendant's witnesses are never sent to the grand jury, except where the attorney for the prosecution consents thereto. But in this incipient stage of the prosecution, the judge may examine witnesses who were present at the time when the offence is said to have been committed, to explain what is said by the witnesses for the prosecution; and the cross-examination of the witnesses for the prosecution, is certainly improper."
We therefore conclude that the examining magistrate did not exceed his authority in excluding evidence of insanity. If the evidence was only for the purpose of showing present insanity by reason of which the accused was not capable of defending the charge of crime, it is an objection which should be taken before or at the time of his trial for the crime, and heard by the court having jurisdiction of the crime. If it was offered to show insanity at the time of the commission of the crime, it was obviously a defense which should be heard at the time of his trial, or by a preliminary hearing in the jurisdiction of the crime, if so provided for by its laws. By the law of New Jersey, insanity as an excuse for crime is a defense, and the burden of making it out is upon the defendant. Graves v. State, 45 N.J.L. 347; State v. Maioni, 78 N.J.L. 339, 341; State v. Peacock, 50 N.J.L. 34, 36. A defendant has no general right to have evidence exonerating him go before a grand jury, and unless the prosecution consents, such witnesses may be excluded: 1 Chitty Crim. Law, 318; United States v. White, supra; Respublica v. Shaffer, 1 Dallas, 236, 255; United States v. Palmer, 2 Cranch Circuit Court, 11; United States v. Terry, 39 Fed. Rep. 355, 362.
2. It is next objected that no formal demand for the extradition of the appellant was made within forty days after his arrest, and that he was therefore entitled to be *463 set at liberty. The objection is founded upon the supplemental convention with Italy of 1884, heretofore set out.
A "certificate," such as was indicated by that convention, was undoubtedly "exhibited" to the committing magistrate, and was the basis of his action. The other parts of the provision are not clear. What is referred to by the phrase, "the requisition, together with the documents above provided," etc., which is required to be made within forty days, or the person set at liberty? The "certificate" attesting "that a requisition has been made," etc., was "exhibited" to Judge Blair; and we fail to find in this clause of the treaty any requirement that the subsequent "formal demand" for the extradition shall be filed with the magistrate within forty days after the arrest of the accused, or at any other time. The whole of the convention should be read together and in connection with § 5270, Rev. Stat., which is applicable to all treaties. Under § 5270 any one of the judicial officers named therein, may, upon complaint, charging one of the crimes named in the treaty, issue his warrant of arrest and hear the evidence of criminality. This done, his duty is, if he deems the evidence sufficient to hold the accused for extradition, to commit him to jail, and to certify his conclusion, with the evidence, to the Secretary of State, who may then, "upon the requisition of the proper authorities of such foreign government, issue his warrant for the surrender of the accused." Rev. Stat., §§ 5272, 5273. Of course, the effect of the supplementary treaty of 1884, being later than the statutory requirements above referred to, is to supersede the statute in so far as there is a necessary conflict in the carrying out of the extradition obligation between this country and Italy. But, as observed in Grin v. Shine, 187 U.S. 181, 191, "Congress has a perfect right to provide for the extradition of criminals in its own way, with or without a treaty to that effect, and to declare *464 that foreign criminals shall be surrendered upon such proofs of criminality as it may judge sufficient. Castro v. DeUriarte, 16 Fed. Rep. 93. This appears to have been the object of § 5270, which is applicable to all foreign governments with which we have treaties of extradition." This section, by its very terms, applies "in all cases in which there now exists or hereafter may exist, any treaty or convention for extradition." Had there been no law of Congress upon the subject, the method of procedure prescribed by the supplementary treaty of 1884 would necessarily have been the proper one, and the committing magistrate could have proceeded only according to the treaty, for that would have been the only law of the land applicable to the case and the only source of his authority.
It was therefore competent for Judge Blair to act upon the complaint made before him independently of any preliminary mandate or certificate, such as was in fact issued and "exhibited" to him in this case, being plainly authorized so to do by the terms of § 5270. The personal rights of the accused are saved by the provisions of the same section, since he could only have been surrendered upon the warrant of the Secretary of State, based upon the evidence presented upon the hearing, and the conclusion of the sufficiency of the evidence of criminality certified to the Secretary of State, and upon a formal requisition for extradition. Castro v. DeUriarte, 16 Fed. Rep. 93, 97; Grin v. Shine, supra.
Construed in the light of the original and supplementary conventions with Italy and of § 5270, Rev. Stat., we do not find that it was obligatory that the "formal demand" referred to in the 1884 clause should be proven in the preliminary proceeding within forty days after the arrest. That is a demand made upon the executive authority of the United States by the executive authority of Italy. Its presentation was not necessary to give the examining magistrate jurisdiction. Such a formal demand *465 was in fact made on July 28, 1910, less than forty days after the arrest. That, together with the certificate of the magistrate and the evidence submitted to him, was the authority of law under which the Secretary of State issued his warrant of extradition. Every requirement of the law, whether it appears in the treaty or in the act of Congress, was substantially complied with. This was the construction placed upon the treaty by Mr. Secretary Knox in answer to the same objection made to him before he issued his warrant, and also of Judge Rellstab, who dismissed the petition for a writ of habeas corpus and from whose decree this appeal comes.
3. By Article I of the extradition treaty with Italy the two governments mutually agree to deliver up all persons, who, having been convicted of or charged with any of the crimes specified in the following article, committed within the jurisdiction of one of the contracting parties, shall seek an asylum in the other, etc. It is claimed by counsel for the appellant that the word "persons" as used in this article does not include persons who are citizens of the asylum country.
That the word "persons" etymologically includes citizens as well as those who are not, can hardly be debatable. The treaty contains no reservation of citizens of the country of asylum. The contention is that an express exclusion of citizens or subjects is not necessary, as by implication, from accepted principles of public law, persons who are citizens of the asylum country are excluded from extradition conventions unless expressly included. This was the position taken by the Foreign Minister of Italy in a correspondence in 1890 with the Secretary of State of the United States, concerning a demand made by the United States for the extradition of Bevivini and Villella, two subjects of Italy whose extradition was sought, that they might be tried for a crime committed in this country. Their extradition was refused *466 by Italy on account of their Italian nationality. The Foreign Minister of Italy advanced in favor of the Italian position these grounds: (a) That the Italian Penal Code of 1890, in express terms provided that, "the extradition of a citizen is not permitted;" (b) That a crime committed by an Italian subject in a foreign country was punishable in Italy, and, therefore, there was no ground for saying that unless extradited the crime would go unpunished; and (c) That it has become a recognized principle of public international law that one nation will not deliver its own citizens or subjects upon the demand of another, to be tried for a crime committed in the territory of the latter, unless it has entered into a convention expressly so contracting, and that the United States had itself recognized the principle in many treaties by inserting a clause exempting citizens from extradition. (United States Foreign Relations 1890, p. 555.) Mr. Blaine, then Secretary of State of the United States, protested against the position of the Italian government and maintained the view that citizens were included among the persons subject to extradition unless expressly excluded. His defense of the position is full and remarkably able. It is to be found in United States Foreign Relations for 1890, pp. 557, 566.
We shall pass by the effect of the Penal Code in preventing the authorities of Italy from carrying out its international engagements to surrender citizens, for that has no bearing upon the question now under consideration, which is, whether under accepted principles of international law, citizens are to be regarded as not embraced within an extradition treaty unless expressly included. That it has come to be the practice with a preponderant number of nations to refuse to deliver its citizens, is true; but this exception is convincingly shown by Mr. Blaine in his reply to the Foreign Minister of Italy and by the thorough consideration of the whole subject by Mr. John *467 Bassett Moore, in his treatise on extradition, ch. V, pp. 152, 193, to be of modern origin. The beginning of the exemption is traced to the practice between France and the Low Countries in the eighteenth century. Owing to the existence in the municipal law of many nations of provisions prohibiting the extradition of citizens, the United States has in several of its extradition treaties clauses exempting citizens from their obligation. The treaties in force in 1910 may, therefore, be divided into two classes, those which expressly exempt citizens, and those which do not. Those which do contain the limitation are by far the larger number. Among the treaties which provide for the extradition of "persons," without limitation or qualification are the following:
With Great Britain, August 9, 1842, extended July 12, 1889, United States Treaties, 1910, pp. 650 and 740.
With France, November 9, 1843, supra, p. 526.
With Italy, February 8, 1868, supra, p. 961.
With Venezuela, August 27, 1860, supra, p. 1845.
With Ecuador, June 28, 1872, supra, p. 436.
With Dominican Republic, February 8, 1867, supra, p. 403.
The treaty with Japan of April 29, 1886, supra, p. 1025, contains a qualification in these words:
"Art. VII. Neither of the contracting parties shall be bound to deliver up its own citizens or subjects under the stipulations of this convention, but they shall have the power to deliver them up if in their discretion it be deemed proper to do so."
The conclusion we reach is, that there is no principle of international law by which citizens are excepted out of an agreement to surrender "persons," where no such exception is made in the treaty itself. Upon the contrary, the word "persons" includes all persons when not qualified as it is in some of the treaties between this and other nations. That this country has made such an exception in some of *468 its conventions and not in others, demonstrates that the contracting parties were fully aware of the consequences unless there was a clause qualifying the word "persons." This interpretation has been consistently upheld by the United States, and enforced under the several treaties which do not exempt citizens. That Italy has not conformed to this view, and the effect of this attitude will be considered later. But that the United States has always construed its obligation as embracing its citizens is illustrated by the action of the executive branch of the Government in this very instance. A construction of a treaty by the political department of the Government, while not conclusive upon a court called upon to construe such a treaty in a matter involving personal rights, is nevertheless of much weight.
The subject is summed up by Mr. John Bassett Moore in his work on extradition, vol. 1, p. 170, § 138, where he says:
"`Persons' includes citizens. In respect to the persons to be surrendered, the extradition treaties of the United States all employ the general term `persons,' or `all persons.' Hence, where no express exception is made, the treaties warrant no distinction as to nationality. Writing on the general subject of the extradition treaties of the United States and the practice thereunder, Mr. Seward said: `In some of the United States' extradition treaties it is stipulated that the citizens or subjects of the parties shall not be surrendered. Where there is no express reservation of the kind, there would not, it is presumed, be any hesitation in giving up a citizen of the United States to be tried abroad.' Such has been the uniform and unquestioned practice under the treaty with Great Britain of 1842, in which the term `all persons' is used."
The effect of yielding to the interpretation urged by Italy would have brought about most serious consequences as to other treaties then in force. One of these was the extradition treaty with Great Britain made as far back as *469 1843. Inasmuch as under the law of that country, as of this, crimes committed by their citizens within the jurisdiction of another country were punishable only where the crime was committed, it was important that the Italian interpretation should not be accepted.
4. We come now to the contention that by the refusal of Italy to deliver up fugitives of Italian nationality, the treaty has thereby ceased to be of obligation on the United States. The attitude of Italy is indicated by its Penal Code of 1900 which forbids the extradition of citizens, and by the denial in two or more instances to recognize this obligation of the treaty as extending to its citizens.
During a preliminary correspondence between the Department of State and the Italian Charge d'Affaires, in reference to the provisional arrest and detention of the appellant under articles I and II of the treaty, as extended by article II of the additional convention of 1884, Mr. Knox, the then Secretary of State, inquired, "whether or not the Department is to understand that by initiating extradition proceedings for the surrender of this American citizen accused of committing murder in Italy, your Government wishes to be understood as surrendering its view heretofore entertained and as being now willing to adopt as to cases which may hereafter arise between the two Governments, the view that the Extradition Treaties of eighteen sixty-eight, eighteen sixty-nine and eighteen eighty-four between the United States and Italy require the surrender by each Government of any and all persons, irrespective of the nationality, who having been convicted for or charged with commission of any of the crimes specified in the treaty within the jurisdiction of one of the contracting parties shall seek an asylum or be found within the territory of the other, and further and specifically to inquire whether the Government of Italy now proposes as to all cases arising in the future to deliver to the Government of the United States under and in accordance with *470 the Treaty provisions those Italian subjects who committing crimes in the United States take refuge in Italy."
   The reply to this was as follows:
                                  "July 1, 1910.
"MR. SECRETARY OF STATE: By telegram of June 24, last, your Excellency inquired whether in instituting extradition proceedings in the case of Porter Charlton, who confessed having committed murder at Moltrasio, the King's Government intended to depart from the rule, heretofore observed, not to surrender its own subjects and whether it was to be inferred that Italians guilty of an offense committed on American territory, who should take refuge in Italy, should hereafter be delivered without fail to the American Government.
"I now have the honor to inform your Excellency that the King's Government cannot depart from the principle established by our law that our nationals cannot be surrendered to foreign powers. Furthermore, this principle does not conflict with the provisions of the Extradition Convention. Indeed it seems logical that so far as parity in the matter of extraditing their respective citizens or subjects is concerned, each party should, in the absence of specific provisions in the Convention itself, be guided by the spirit of its own legislation.
"The Italian law does not consent to the extradition of nationals, but the Italian courts are competent to try on the request of a foreign Government, their nationals who may have committed offenses on that Government's Territory.
"Contrariwise, the laws of the United States by not permitting local tribunals to try American citizens for offenses committed abroad seem to admit of their being extradited. Otherwise an offender would, under the egis of the law itself, escape the punishment he deserves.
"I have the honor to inform your Excellency that the requisite extradition papers in the case of Porter Charlton *471 will be forwarded to me without delay and in the meanwhile I beg you kindly to cause the prisoner to be held in provisional detention."
On July 28, 1910, the following communication was addressed to the Secretary of State, and was received on July 30, 1910:
"MR. SECRETARY OF STATE: Referring to previous communications and in accordance with the provisions of Article V of the Extradition Convention of March 23, 1868, I have honor to lay before your Excellency a formal request for the extradition of Porter Charlton who has confessed the crime of murder committed on the person of his own wife at Moltrasio, Como, which crime is specified in Article II, Section 1 of the said Convention.
"Your Excellency has already been so good as to forward to me, in note No. 864 of June 28 last, the preliminary certificate of arrest provided by Article II of the Additional Convention of June 11, 1884, with a view to the provisional arrest of the above named accused.
"In support of this request, I have the honor to transmit herewith to Your Excellency the record of proceedings conducted by the Court of Como in the case of the aforesaid murder. The papers are regularly vised by the Embassy of the United States at Rome.
"Awaiting the Federal `warrant' and the kind return of the enclosed papers for submisssion to the competent court, I avail myself of this opportunity to renew to Your Excellency, together with my thanks in advance, the assurance of my highest consideration."
To this the Secretary of State, after the conclusion of the hearing before Judge Blair and the receipt by the Department of his judgment and the evidence produced before him, replied as follows:

"WASHINGTON, December 10, 1910.
"EXCELLENCY: In compliance with the request made by your Embassy in its note of July 28 last, and in pursuance *472 of existing treaty stipulations between the United States and Italy, I have the honor to enclose a warrant of surrender in the case of Porter Charlton, charged with murder committed within the jurisdiction of the Kingdom of Italy, and examined and committed for surrender by the Honorable John A. Blair, Judge of the Court of Common Pleas in and for the County of Hudson, in the State of New Jersey.
"Accept, Excellency, the renewed assurance of my highest consideration."
The attitude of the Italian Government indicated by proffering this request for extradition "in accordance with Article V of the Treaty of 1868," is, as shown by the communication of July 1st set out above, substantially this, 
First. That crimes committed by an American in a foreign country were not justiciable in the United States, and must, therefore, go unpunished unless the accused be delivered to the country wherein the crime was committed for trial.
Second: Such was not the case with Italy, since under the laws of Italy, crimes committed by its subjects in foreign lands were justiciable in Italy.
Third: That as a consequence of the difference in the municipal law, "it was logical that so far as parity in the matter of extraditing their respective citizens or subjects is concerned, each party should, in the absence of specific provisions in the Convention itself, be guided by the spirit of its own legislation."
This adherence to a view of the obligation of the treaty as not requiring one country to surrender its nationals while it did the other, presented a situation in which the United States might do either of two things, namely: abandon its own interpretation of the word "persons" as including citizens, or adhere to its own interpretation and surrender the appellant, although the obligation had, *473 as to nationals, ceased to be reciprocal. The United States could not yield its own interpretation of the treaty, since that would have had the most serious consequence on five other treaties in which the word "persons" had been used in its ordinary meaning, as including all persons, and, therefore, not exempting citizens. If the attitude of Italy was, as contended, a violation of the obligation of the treaty, which, in international law, would have justified the United States in denouncing the treaty as no longer obligatory, it did not automatically have that effect. If the United States elected not to declare its abrogation, or come to a rupture, the treaty would remain in force. It was only voidable, not void; and if the United States should prefer, it might waive any breach which in its judgment had occurred and conform to its own obligation as if there had been no such breach. 1 Kent's Comm., p. 175.
Upon this subject Vattel, page *452, says:
"When the treaty of peace is violated by one of the contracting parties, the other has the option of either declaring the treaty null and void, or allowing it still to subsist; for a contract which contains reciprocal engagements, cannot be binding on him with respect to the party who on his side pays no regard to the same contract. But, if he chooses not to come to a rupture, the treaty remains valid and obligatory."
Grotius says (book 3, ch. 20, par. 38):
"It is honourable, and laudable to maintain a peace even after it has been violated by the other parties: as Scipio did, after the many treacherous acts of the Carthaginians. For no one can release himself from an obligation by acting contrary to his engagements. And though it may be further said that the peace is broken by such an act, yet the breach ought to be taken in favour of the innocent party, if he thinks proper to avail himself of it."
*474 In Moore's International Law Digest. Vol. 5, page 566, it is said:
"A treaty is primarily a compact between independent nations, and depends for the enforcement of its provisions on the honor and the interests of the governments which are parties to it. If these fail, its infraction becomes the subject of international reclamation and negotiation, which may lead to war to enforce them. With this judicial tribunals have nothing to do."
In the case of In re Thomas, 12 Blatchf. 370, Mr. Justice Blatchford (then District Judge) said:
"Indeed, it is difficult to see how such a treaty as that between Bavaria and the United States can be abrogated by the action of Bavaria alone, without the consent of the United States. Where a treaty is violated by one of the contracting parties, it rests alone with the injured party to pronounce it broken, the treaty being, in such case, not absolutely void, but voidable, at the election of the injured party, who may waive or remit the infraction committed, or may demand a just satisfaction, the treaty remaining obligatory if he chooses not to come to a rupture."
In the case of Terlinden v. Ames, 184 U.S. 270, 287, the question was presented whether a treaty was a legal obligation if the state with whom it was made was without power to carry out its obligation. This court quoted with approval the language of Justice Blatchford, set out above, and said (p. 285):
"And without considering whether extinguished treaties can be renewed by tacit consent under our Constitution, we think that on the question whether this treaty has ever been terminated, governmental action in respect to it must be regarded as of controlling importance."
That the political branch of the Government recognizes the treaty obligation as still existing is evidenced by its action in this case. In the memorandum giving the reasons *475 of the Department of State for determining to surrender the appellant, after stating the difference between the two governments as to the interpretation of this clause of the treaty, Mr. Secretary Knox said:
"The question is now for the first time presented as to whether or not the United States is under obligation under treaty to surrender to Italy for trial and punishment citizens of the United States fugitive from the justice of Italy, notwithstanding the interpretation placed upon the treaty by Italy with reference to Italian subjects. In this connection it should be observed that the United States, although, as stated above, consistently contending that the Italian interpretation was not the proper one, has not treated the Italian practice as a breach of the treaty obligation necessarily requiring abrogation, has not abrogated the treaty or taken any step looking thereto, and has, on the contrary, constantly regarded the treaty as in full force and effect and has answered the obligations imposed thereby and has invoked the rights therein granted. It should, moreover, be observed that even though the action of the Italian Government be regarded as a breach of the treaty, the treaty is binding until abrogated, and therefore the treaty not having been abrogated, its provisions are operative against us.
"The question would, therefore, appear to reduce itself to one of interpretation of the meaning of the treaty, the Government of the United States being now for the first time called upon to declare whether it regards the treaty as obliging it to surrender its citizens to Italy, notwithstanding Italy has not and insists it can not surrender its citizens to us. It should be observed, in the first place, that we have always insisted not only with reference to the Italian extradition treaty, but with reference to the other extradition treaties similarly phrased that the word `persons' includes citizens. We are, therefore, committed to that interpretation. The fact that *476 we have for reasons already given ceased generally to make requisition upon the Government of Italy for the surrender of Italian subjects under the treaty, would not require of necessity that we should, as a matter of logic or law, regard ourselves as free from the obligation of surrendering our citizens, we laboring under no such legal inhibition regarding surrender as operates against the government of Italy. Therefore, since extradition treaties need not be reciprocal, even in the matter of the surrendering of citizens, it would seem entirely sound to consider ourselves as bound to surrender our citizens to Italy even though Italy should not, by reason of the provisions of her municipal law be able to surrender its citizens to us."
The executive department having thus elected to waive any right to free itself from the obligation to deliver up its own citizens, it is the plain duty of this court to recognize the obligation to surrender the appellant as one imposed by the treaty as the supreme law of the land and as affording authority for the warrant of extradition.
Judgment affirmed.
