
85 U.S. 332 (1873)
18 Wall. 332
COOK
v.
TULLIS.
Supreme Court of United States.

*335 Messrs. George Hoadly and E.M. Johnson, for the appellants.
Mr. H.A. Morrill, contra.
*337 Mr. Justice FIELD, after stating the facts of the case, delivered the opinion of the court, as follows:
It is evident from the statement of the transaction, that the transfer by Homans to the defendant of the note and mortgage of Hardesty does not present a case of preference made by a bankrupt to one creditor over another, within the meaning of the Bankrupt Act. It was not a transfer to prefer a creditor. There was no debt at the time to the defendant to be preferred. The transaction was not one of borrowing. There was no loan made nor credit given. It was the case of an exchange of one species of property for another, made by one party without authority from the other, and subsequently ratified by the latter, or it was the case of the conversion to his use by the depositary of property in his hands, and his substituting property equivalent in value as the investment of the property converted.
This suit must proceed, therefore, if at all, not on the ground of an alleged preference to a creditor in violation of the Bankrupt Act, but upon the ground that the title to the note and mortgage never passed from the bankrupt, because the ratification of his unauthorized transaction was not made until after the period when the rights of the trustees attached; or on the ground that the note and mortgage never *338 became subject in the hands of the bankrupt to the claim of the defendant as the investment of the latter's property, because the bonds appropriated were not first sold and their proceeds used in the purchase of the note and mortgage.
Both of these grounds were urged by counsel of the appellants, and it is on their disposition that the case must be determined.
The substitution of the note and mortgage in place of the bonds was approved by the defendant immediately upon being made acquainted with the facts. This approval constituted a ratification of the transaction. The general rule as to the effect of a ratification by one of the unauthorized act of another respecting the property of the former, is well settled. The ratification operates upon the act ratified precisely as though authority to do the act had been previously given, except where the rights of third parties have intervened between the act and the ratification. The retroactive efficacy of the ratification is subject to this qualification. The intervening rights of third persons cannot be defeated by the ratification. In other words, it is essential that the party ratifying should be able not merely to do the act ratified at the time the act was done, but also at the time the ratification was made. As said in one of the cases cited by counsel, "the ratification is the first proceeding by which he (the principal ratifying) becomes a party to the transaction, and he cannot acquire or confer the rights resulting from that transaction unless in a position to enter directly upon a similar transaction himself. Thus, if an individual pretending to be the agent of another should enter into a contract for the sale of land of his assumed principal, it would be impossible for the latter to ratify the contract if, between its date and the attempted ratification, he had himself disposed of the property. He could not defeat the intermediate sale made by himself, and impart validity to the sale made by the pretended agent, for his power over the property or to contract for its sale would be gone."[*] On the same principle *339 liens by attachment or judgment upon the property of a debtor are not affected by his subsequent ratification of a previous unauthorized transfer of the property.[*]
The question, therefore, in this case is whether any rights of third parties did thus intervene between the act of substitution made by Homans and its adoption and ratification by Tullis, which defeated the retroactive efficacy of the ratification. And the test is, as already indicated, could the parties have made the transaction at the time of the ratification without contravening the provisions of the Bankrupt Act? It is asserted by the appellants that the rights of the trustees extend not only to all property of the bankrupt in his possession when proceedings in bankruptcy were instituted against him, but also to all property transferred by the bankrupt within four months previously to a creditor in order to give him a preference over other creditors, or transferred by the bankrupt within six months previously to any one to defeat or evade the operation of the Bankrupt Act, the grantee in both cases knowing or having reasonable cause to believe that the grantor was at the time insolvent or that he then contemplated insolvency. Admitting this to be so, it does not follow that the trustees acquired any right to the note and mortgage in question. They were not transferred to the defendant, as already stated, to give a preference to one creditor of the bankrupt over another, for the defendant was not a creditor of Homans at the time, nor were they transferred to him to evade or defeat any of the provisions of the Bankrupt Act; the transaction was neither designed nor calculated to have any such effect. Homans was not insolvent at the time, nor did he contemplate insolvency. But even if he had been then insolvent, the transaction would not have been the subject of just complaint on the part of his creditors, if made with the approval of the defendant whose bonds were taken. There is no pretence that the property substituted was not equally valuable *340 with that taken, or that the estate of the bankrupt was any the less available to his creditors. A fair exchange of values may be made at any time, even if one of the parties to the transaction be insolvent. There is nothing in the Bankrupt Act, either in its language or object, which prevents an insolvent from dealing with his property, selling or exchanging it for other property at any time before proceedings in bankruptcy are taken by or against him, provided such dealing be conducted without any purpose to defraud or delay his creditors or give preference to any one, and does not impair the value of his estate. An insolvent is not bound, in the misfortune of his insolvency, to abandon all dealing with his property; his creditors can only complain if he waste his estate or give preference in its disposition to one over another. His dealing will stand if it leave his estate in as good plight and condition as previously.
We do not think, therefore, that the rights of the trustees, though relating back four months so as to avoid preferences to creditors, and six months to avoid transfers to others, in fraud of the act, and thus going back of the ratification, touched the transaction in question or prevented the ratification from having complete retroactive efficacy.
The position of counsel, that the ratification, if sustained, only extended to the conversion of the bonds, and merely operated to deprive the transaction of its tortious aspect, all else consisting of dealings by Homans with his own property, is not tenable. The answer to it is, that the ratification was of the whole transaction taken together; that of the appropriation of the bonds upon substituting an equivalent in value for them, not of a part without the rest, not of the appropriation without the substitution.
Nor do we perceive the force of the objection to the validity of the transaction, because Homans intended to limit the transfer to the value of the bonds, to wit, six thousand dollars. The transfer was in form of the whole note, with a reservation to himself of the surplus over the amount of the bonds received from its proceeds. The note being indivisible, the legal title to a part could only be made by a *341 transfer of the instrument itself. The reservation of the surplus was not forbidden by any rule of law, and a court of equity would, and, in this case has, given effect to it.
But if we lay aside the doctrine of ratification as inapplicable, and assume that the transaction could not have been made by the parties after the failure of Homans, and, therefore, that the previous substitution could not then have been ratified, and treat the case as one of simple misappropriation of property of the defendant, still the trustees must fail in their suit. They took the property of the bankrupt subject to all legal and equitable claims of others. They were affected by all the equities which could be urged against him. Now, it is a rule of equity jurisprudence, perfectly well settled and of universal application, that where property held upon any trust to keep, or use, or invest it in a particular way, is misapplied by the trustee and converted into different property, or is sold and the proceeds are thus invested, the property may be followed wherever it can be traced through its transformations, and will be subject, when found in its new form, to the rights of the original owner or cestui que trust.
In the case of Taylor, assignee of a bankrupt, against Plumer,[*] this doctrine is well illustrated. There a draft for money was intrusted to a broker to buy exchequer bills for his principal, and the broker received the money and misapplied it by purchasing American stock and bullion, intending to abscond with them, and did abscond, but was taken before he quitted England. Thereupon he surrendered the stock and bullion to his principal, who sold the whole and received the proceeds. The broker became bankrupt on the day he received and misapplied the money, and his assignees sued for the proceeds of the stock and bullion. But the court decided that the principal was entitled to the proceeds as against the assignees, holding that if property in its original state and form is covered with a trust in favor of the principal, no change of that state and form can divest *342 it of such trust and give to the trustee, or those who represent him in right, any more valid claim in respect to it than he previously had; and that it makes no difference in reason or law into what other form, different from the original, the change may have been made, for the product of, or substitution for, the original thing still follows the nature of the thing itself, as long as it can be ascertained to be such, and that the right only ceases when the means of ascertainment fail.
It is contended that the doctrine of this case does not apply, because the note and mortgage were not purchased with the proceeds of the bonds taken, but were substituted for them. We do not think this fact takes the present case from the principle upon which the other proceeds, that property acquired by a wrongful appropriation of other property covered by a trust, is itself subject to the same trust. It cannot alter the case that the newly acquired property, instead of being purchased with the proceeds of the original property, is obtained by a direct exchange for it. The real question in both cases is, what has taken the place of the property in its original form? Whenever that can be ascertained, the property in the changed form may be claimed by the original owner or the cestui que trust, and assignees and trustees in bankruptcy can acquire no interest in the property in its changed form which will defeat his rights in a court of equity.
DECREE AFFIRMED.
Mr. Justice MILLER dissented.
NOTES
[*]  McCracken v. City of San Francisco, 16 California, 624.
[*]  Taylor v. Robinson, 14 California, 396; Wood v. McCain, 7 Alabama, 806; Bird v. Brown, 4 Exchequer, 799.
[*]  3 Maule & Selwyn, 562.
