
137 U.S. 280 (1890)
UNITED STATES
v.
LYNCH.
No. 1195.
Supreme Court of United States.
Argued November 20, 1890.
Decided December 8, 1890.
ERROR TO THE SUPREME COURT OF THE DISTRICT OF COLUMBIA.
*282 Mr. R. Mason Lisle in person, (with whom was Mr. J. Edward Carpenter on the brief,) for plaintiff in error.
*283 Mr. Assistant Attorney General Maury for defendant in error.
MR. CHIEF JUSTICE FULLER delivered the opinion of the court.
As the matter in dispute does not reach the jurisdictional sum or value, it is contended that this court has jurisdiction to entertain the writ of error because "the validity of an authority exercised under the United States" was drawn in question in the case. 23 Stat. 443, c. 355.
The claim of the relator arises under the last clause of section 2 of the act of March 3, 1835, entitled "An Act to Regulate the Pay of the Navy of the United States," 4 Stat. 755, 757, c. 27, which reads: "It is hereby expressly declared that the yearly allowance provided in this act is all the pay, compensation, and allowance that shall be received under any circumstances whatever, by any such officer or person, except for travelling expenses when under orders, for which ten cents per mile shall be allowed."
By section 273 of the Revised Statutes it is provided that: "It shall be the duty of the Second Comptroller: First. To examine all accounts settled by the Second, Third, and Fourth Auditors, and certify the balances arising thereon to the Secretary of the Department in which the expenditure has been incurred. Second. To countersign all warrants drawn by the Secretaries of War and of the Navy, which shall be warranted by law."
And by section 277: "The duties of the Auditors shall be as follows: ... Fifth. The Fourth Auditor shall receive and examine all accounts accruing in the Navy Department or relative thereto, and all accounts relating to Navy pensions; and, after examination of such accounts, he shall certify the balances, and shall transmit such accounts, with the vouchers and certificate, to the Second Comptroller for his decision thereon."
Section 236 provides: "All claims and demands whatever by the United States or against them, and all accounts whatever *284 in which the United States are concerned, either as debtors or as creditors, shall be settled and adjusted in the Department of the Treasury."
By the act establishing the offices of Comptroller and Auditor, the former was authorized and required "to superintend the adjustment and preservation of the public accounts," and "to examine all accounts settled by the Auditor;" and it was made the duty of the latter "to receive all public accounts, and after examination to certify the balance, and transmit the accounts with the vouchers and certificate to the Comptroller for his decision thereon." 1 Stat. 66.
Considering the accepted definition of an auditor with the language used in these provisions, the Fourth Auditor may be correctly said to be authorized to examine accounts accruing in the Navy Department, compare the items with the vouchers, allow or reject charges, and state the balance; and the Comptroller has authority to revise the action of the Auditor and certify the balances finally found by him.
It is stated in the opinion delivered by Mr. Chief Justice Waite in United States v. Graham, 110 U.S. 219, 220, cited on behalf of relator, that it was found as a fact in that case "that on the 6th of April, 1835, which was only a little more than a month after the act of 1835 passed, circular instructions were issued from the Treasury Department to the effect that mileage at the rate of ten cents a mile was fixed by law and should be paid for travelling expenses within the United States, but that the usual and necessary passage money actually paid by officers returning from foreign service, under orders or on sick ticket, when they could not return in a public vessel, would be paid as theretofore, as well as the like expenses of officers going out. The navy regulations adopted in 1865, and in force in 1872, when the claim of Graham, the appellee, accrued, provided that `for travelling out of the United States the actual expenses only are allowed.' It is also found that from the time of the passage of the act of 1835 until the decision of Temple's case in this court, the Navy and Treasury Departments had, with a single exception, always held that the ten cents a mile did not apply to travel *285 to, from, or in foreign countries, but only to travel in the United States. In Temple's case the long continued practice in the Departments was relied on to justify the decision of the accounting officers of the Treasury against him, but the fact of the actual existence of the practice was not found as it has been now."
The decision in United States v. Temple, 105 U.S. 97, was announced at October term, 1881. That case brought under consideration the act of Congress of June 30, 1876, relating to the mileage of officers of the Navy, while Graham's case arose under the act of March 3, 1835, and it was held that, as the language of the statute in each instance was clear and precise and its meaning evident, there was no room for construction, and that eight cents a mile in the one case and ten cents in the other, was properly allowed the claimants by the Court of Claims, from whose judgments in their favor appeals were prosecuted to this court.
It is now argued that the duty of the Fourth Auditor and of the Second Comptroller, under the last clause of section 2 of the act of 1835 and the decision of this court in relation to it, was merely ministerial, and that by the disallowance of relator's claim for mileage these officers exercised a discretion which they did not possess; that this was an invalid exercise of an authority under the United States; and that hence the validity of the authority was drawn in question. In order to justify this position, however, the validity of the authority must have been drawn in question directly and not incidentally. The validity of a statute is not drawn in question every time rights claimed under such statute are controverted, nor is the validity of an authority, every time an act done by such authority is disputed. The validity of a statute or the validity of an authority is drawn in question when the existence, or constitutionality, or legality of such statute or authority is denied, and the denial forms the subject of direct inquiry.
We think that the authority of the Second Comptroller and the Fourth Auditor is not thus denied here, nor the validity of that authority questioned, but that what is claimed is that in the exercise of a valid authority, the Auditor and Comptroller *286 erred in respect to an allowance, in view of the decision of this court in another case.
In Decatur v. Paulding, 14 Pet. 497, 515, it was remarked by Mr. Chief Justice Taney that the duties to be performed by the head of an executive department of the government, whether imposed by act of Congress or by resolution, are not, in general, mere ministerial duties; that departmental duties are executive in their nature; that the laws and resolutions of Congress under which the departments are required to act have to be expounded in the exercise of judgment; and that, while the court would not be bound to adopt the construction given, when departmental decisions are under review in a proper case, the court would not by mandamus control the exposition of statutes by direct action upon executive officers. In relation to the interpretation of a pension law by the Commissioner of Pensions and the Secretary of the Interior, in United States ex rel. Dunlap v. Black, Commissioner, 128 U.S. 40, 48, Mr. Justice Bradley said: "Whether, if the law were properly before us for consideration, we should be of the same opinion, or of a different opinion, is of no consequence in the decision of this case."
The contention of the relator is, that the interpretation he puts upon the act is too obviously correct to admit of dispute, and that this court has so decided; but it does not follow, because the decision of the Comptroller and Auditor may have been erroneous, that the assertion of relator to that effect raises a cognizable controversy as to their authority to proceed at all. What the relator sought was an order coercing these officers to proceed in a particular way, and this order the Supreme Court of the District declined to grant. If we were to reverse that judgment upon the ground urged, it would not be for want of power in the Auditor to audit the account, and in the Comptroller to revise and pass upon it, but because those officers had disallowed what they ought to have allowed and erroneously construed what needed no construction. This would not in any degree involve the validity of their authority. Snow v. United States, 118 U.S. 346, 353; Baltimore and Potomac Railroad Co. v. Hopkins, 130 U.S. 210. In *287 Clayton v. Utah Territory, 132 U.S. 632, the power vested in the governor of the Territory of Utah by the organic act, to appoint an auditor of public accounts, was drawn in question; and in Clough v. Curtis, 134 U.S. 361, 369, the lawful existence, as the legislative assembly of the Territory of Idaho, of a body of persons claiming to exercise as such the legislative power conferred by Congress, was controverted. In Neilson v. Lagow, 7 How. 772, 775, and 12 How. 98, the plaintiff in error claimed the land in dispute through an authority exercised by the Secretary of the Treasury, and the State court decided against its validity. The existence or validity of the authority was primarily involved in these cases, and they contain nothing to the contrary of our present conclusion.
Why the relator did not bring suit in the Court of Claims does not appear, nor does the record show the reasons of the Second Comptroller for rejecting this claim in 1887, nor for the action of the present Auditor and Comptroller other than as indicated in the demurrer. These matters are, however, immaterial in the view which we take of the case.
The writ of error must be dismissed and it is
So ordered.
