Judgment went for plaintiff in the court below, and defendants appeal from an order denying their motion for a new trial.

The action is to foreclose two certain chattel mortgages executed by the appellants, Dowdell & Son, to the Bank of St. Helena upon certain wine, to secure two promissory notes given by said appellants to said bank, which were assigned to respondent immediately before the commencement of this action. The notes were overdue when assigned to respondent, and he then knew the facts upon which the defense in this case rests; and it is not seriously contended that he does not stand in the shoes of the bank. If the bank could not have maintained this action, then it cannot be maintained by respondent.

The wine was stored in cellars in the town of St. Helena, in Hapa county. On April 8, 1895, appellants had negotiations at St. Helena with George F. Chevalier, a wine merchant of San Francisco (doing business under the name of F. Chevalier & Co.), for the sale to him of a large part of said wine. He kuew that the wine was mortgaged to the bank, and during the day had a conversation at the bank, with its cashier, about the contemplated purchase. About 7 or 8 o’clock in the evening, in pursuance of a previous appointment, the Dowdells, Chevalier, and the said cashier met at the said bank for the purpose of completing the said purchase of the wine by Chevalier. The cashier was requested to draw up a written contract, which he did, and it was duly signed and executed by the Dowdells and Chevalier. By this instrument the former sold to the latter, and the latter purchased, three hundred and sixty-eight thousand gallons- of the wine, at eleven cents per gallon. Delivery of the wine was to commence immediately, and to be continued at the rate of not less than fifty thousand gallons per month. Five thousand dollars was to be paid on May 1st, and thereafter there were to be monthly payments for all wine delivered. When the cashier had nearly completed the writing of *682the instrument, he said: “I neglected the most important part, as far as I am concerned. This is where I get in, as the payments shall be made to the bank of St. Helena.” Thereupon he inserted the following clause: “All payments on said wine to be made to the Bank of St. Helena for our account, the cashier of said bank to receipt for the same.” The preponderance "of the evidence shows that Chevalier offered to make to the bank, at that time, the first payment provided by the contract, and that the cashier said it was not necessary; and it fully appears that Chevalier was perfectly able, financially, to make all the payments provided by the contract, and was so understood to be by the cashier, who so testified. Chevalier & Co. have always been willing, ready, and able to take the wine, and pay for it according to the contract. Immediately after the execution of the contract Dowdell & Son commenced to deliver the wine to Chevalier & Co., and on April 13th “had delivered on the cars at the station for shipment six carloads thereof, which said purchaser was about to remove from said county of Napa under and by virtue of said agreement of sale.” But on April 11th the bank had assigned the notes and mortgages to the respondent Carpy, who on the 13th commenced this action, and by means of a receiver and an injunction stopped the removal of said- cars and the delivery of any more of the wine by appellants to said Chevalier & Co.

Appellants contend that under the circumstances above stated the bank could not legally, by a suit to foreclose, prevent the delivery of the wine to Chevalier & Co. pursuant to said contract, which it had consented to and induced the parties to make. The contention of respondent is, briefly: 1. That what the cashier did does not bind the bank; and 2. That what he did was of no legal consequence whatever, even if his acts in the premises be considered as the acts of the bank. As to the first of said positions, we think that it is clearly untenable. It is in proof without contradiction that, to the knowledge and with the consent and tacit approval *683of the directors of the bank, this same cashier had for many years been having with others and with appellants the same kind of transactions as the one here under consideration; that is, the bank had been in the habit of taking mortgages from various persons on wine, and the cashier, with the knowledge and consent of the directors as aforesaid, had permitted wine thus mortgaged to be sold to third parties under contracts similar to the one here involved. This was proven at the trial by the president of the bank and four of its other directors, by the said cashier himself, by several witnesses who had similar transactions with the bank, and by the appellant, Arthur B. C. Dowdell, who prior to this contract had several similar transactions with said cashier. We have said that this was proven without contradiction, by which we mean that the facts above stated were so proven, although some of the witnesses testified that there had not been any resolution upon the subject passed by the board of directors in corporate body assembled, and that they did not understand that the cashier had been given any power to release a mortgage. Under these circumstances, it is not necessary to determine what powers the cashier had merely by virtue of his position as cashier; for when a corporation, by a long course of acquiescence, holds out an officer or agent as having authority to do certain things, it cannot after he has acted repudiate his acts. This principle is decided by many authorities, but it is sufficient here to cite Morse on Banks and Banking, 3d ed., sec. 171 g, and cases there cited, and Martin v. Webb, 110 U. S. 7; Merchants Bank v. State Bank, 10 Wall. 604; Bank v. McCarthy, 7 Mo. App. 318; Carey v. Petroleum Co., 33 Cal. 694. In Morse on Banks and Banking, 3d ed., section 171 g, it is said—and the cases cited fully warrant the text—as follows: “ Evidence of powers habitually exercised by a ■ cashier with the knowledge and acquiescence of the bank, defines his powers as to the public, if they are such as the directors have authority to confer on him. A bank, for several years, permitted its cashier to can*684cel trust deeds given to secure money loaned, and was thereby estopped to deny his power to cancel.” It is also there declared that, where the conduct of a cashier has been open and long continued, “it must have come to the knowledge of any ordinarily vigilant .directory.” (Citing Bank v. McCarthy, supra, which fully sustains the text.) Martin v. Webb, supra, is a case in which the principle under discussion was directly involved and clearly stated. Mr. Justice Harlan, in delivering the opinion of the court, said, among other things, as follows: “While these propositions are recognized in the adjudged cases as sound, it is clear that a banking corporation may be represented by its cashier—at least where its charter does not otherwise provide—in transactions outside of his ordinary duties, without his authority to do so being in writing, or appearing upon the record of the proceedings of the directors. His authority may be by parol and collected from circumstances. It may be inferred from the general manner in which, for a period sufficiently long to establish a settled course of business, he has been allowed, without interference, to conduct the affairs of the bank. It may be implied from the conduct or acquiescence of the corporation, as represented by the board of directors. When, during a series of years, or in numerous business transactions, he has been permitted, without objection, in his official capacity, to pursue a particular course of conduct, it may be presumed, as between the bank and those who, in good faith, deal with it upon the basis of his authority to represent the corporation, that he has acted in conformity with instructions received from those who have the right to control its operations. Directors cannot, in justice to those who deal with the bank, shut their eyes to what is going on around them. It is their duty to use ordinary diligence in ascertaining the condition of its business, and to exercise reasonable control and supervision of its officers. They have something more to do than, from time to time, to elect the officers of the bank and to make declarations of divi*685dends. That which they ought, by proper diligence, to have known as to the general course of business in the bank, they may be presumed to have known in any contest between the corporation and those who are justified by the circumstances in dealing with its officers upon the basis of that course of business.” It is clear, therefore, that the acts of the cashier in the premises were the acts of the bank.

But it is contended by respondent (substantially) that the conduct of the cashier, even if considered as binding the bank, amounted in law to absolutely nothing; that notwithstanding this conduct the bank, although having consented to and encouraged the sale, and being in effect a party to it, could interfere with and put an end to it at any time and without any reason, and merely at its own whim. This would be violative of the principles of fair dealing, and unwarranted, we think, by the law. We do not think it necessary to determine here that the consent of a mortgagee of chattels to the sale of the mortgaged property and its removal from the county amounts to an absolute release of the entire mortgage, and as against all parties who may choose afterward to deal with it—although there are many authorities to that effect, some of which have hereinbefore been noted. We think, however, that upon sound principles the bank was estopped, at least, from interfering with the sale by appellants to Chevalier while its terms were being complied with, and from the attempt to disregard and practically annul such sale by the proceedings in foreclosure. There is no pretense that anything whatever took place after the sale and before the bringing of the action to foreclose that changed the. position of any of the parties, or in any manner whatever affected injuriously the rights of the bank. It is admitted that Chevalier was perfectly able to comply with the terms of the sale, and was willing and ready to do so; it is apparent that the money to be paid by him for the amount of wine purchased would have been more than sufficient to satisfy the demands of the bank *686against appellants; a large part of the wine had been delivered, and there is no justifiable reason apparent why the bank should have then sought to repudiate its acts by which it consented to and induced the sale. Of course, Chevalier would not have purchased without the consent of the bank, and the appellants could have made no effectual effort to sell without such consent. That consent is clearly established; for not only does it appear from the circumstances under which the sale was made, but the cashier testified: “I was satisfied with the responsibility of Chevalier & Go., of course, or I would not have consented to the sale, and if the notes and mortgages had not been assigned we would not have objected to Chevalier & Co. taking the wine, so long as they continued to make payments to the bank as required by the contract.” The bank having thus consented to the sale, and shaped the same to suit itself, and induced the parties to enter into the transaction, and encouraged the appellants to make a contract by which they incurred great pecuniary responsibilities, and to forego other attempts to dispose of the wine, and to go to the expense of delivering a large part of it—upon what principle of fair dealing or legal right can it now, without any apparent reason or worthy motive, abandon the parties in the positions in which it induced them to take? We think that the bank is clearly estopped to deny the validity of the sale and to defeat it by means of the action to foreclose. The principle of equitable estoppel is aptly and concisely stated by the supreme court of the United States in the opinion of Mr. Justice Clifford in Swain v. Seamens, 9 Wall. 274, in language that has since been frequently quoted and approved, as follows: “ Where a person tacitly encourages an act to be done he cannot afterward exercise his legal right in opposition to such consent, if his conduct or acts of encouragement induced the party to change his position, so that he will be pecuniárily prejudiced by the assertion of such adversary claim”; and the case at bar is not only within that principle, but is a much stronger case than one where a *687party only “ tacitly encourages” an act to be done. In Dickerson v. Colgrove, 100 U. S. 580, the United States supreme court states the principle as follows: “ The vital principle is that he who by his language or conduct leads another to do what he would not otherwise have done shall not subject such person to loss or injury by disappointing the expectations upon which he acted. Such a change of position is sternly forbidden. It involves fraud and falsehood, and the law abhors both.” And, in the opinion in that case, many cases are cited and approved, in some of which the principle was applied to the extent of destroying a chattel mortgage. (See, also, Van Syckel v. O’Hearn, 50 N. J. Eq. 175; Daniels v. Tearney, 102 U. S. 420; Faxton v. Faxon, 28 Mich. 159, and cases there cited.) In California the principle has been frequently so declared as to embrace the case at bar. (Scott v. Jackson, 89 Cal. 262; Dolbeer v. Livingston, 100 Cal. 621; Hostler v. Hays, 3 Cal. 303; Mitchell v. Reed, 9 Cal. 204; 70 Am. Dec. 647.) It is contended that there was no consideration for the said acts of the bank; but, in the first place, there was a consideration, for the bank was to receive all the money due it from appellants, instead of relying on a forced sale of the wine;' and, in the second place, the principle of equitable estoppel does not rest upon a consideration moving to the party estopped. (Van Syckel v. O’Hearn, supra, and cases there cited.) Our conclusion is that the bank and its assignee were, under the facts above stated, estopped from maintaining this action.

Respondent makes some contention, in a part of his brief which seems to be supplementary, that estoppel cannot be relied on by appellants because it was not pleaded in the answer. There is some conflict of authorities as to whether the rule requiring estoppels to be pleaded is not confined to technical estoppels by deed or record. (Hostler v. Hays, supra; Caldwell v. Auger, 4 Minn. 217; 77 Am. Dec. 515, and notes; Clarke v. Huber, 25 Cal. 594; Davis v. Davis, 26 Cal. 23; 85 Am. *688Dec. 157.) But, assuming that the rule applies to equitable estoppels in pais, it is sufficient if “ the matter”— the facts—upon which the estoppel rests be pleaded, so that the opposite party may know its nature. The reason of the rule is given by the court in Davis v. Davis, swpra, where it is said that “it is but just, and is in accordance with the rules of pleading in equity cases, that the party relying upon an equitable estoppel in pais should inform the adverse party of the nature of the cause of action or defense which he will be obliged to meet.” This was done in the answer in the case' at bar, in which the facts above stated are fully set forth. Moreover, there was no objection at the trial to evidence of the facts on the score of defective pleading; and the rule is well established that such a course is a waiver of a defect in pleading.

We have followed the course of the arguments of counsel, who have discussed the real and ultimate merits of the case without particular reference to the form in which the questions involved arise.' With respect to the findings, it is sufficient to say that the following part of finding VII is not supported by the evidence, viz: “ Said agreement .... was not approved by said corporation, and said corporation did not agree to its terms, and did not consent that the defendants might deliver said wine to said Chevalier & Go., or that said wine might be removed from the county of Napa, nor was the consent or permission of said corporation to the making of said sale asked or given”; and that there is not sufficient evidence to support the findings in finding III, that “ a removal of said mortgaged property from the county of Napa would have resulted in damage and injury to the plaintiff,” and that plaintiff “ would have suffered irreparable injury therefrom” had it not been for the appointment of a receiver. It is unnecessary to discuss the other findings. There are quite a number of exceptions to the rulings of the court as to the admissibility of the evidence; but, under the views above expressed, it is not *689necessary to discuss said exceptions. It can be sufficiently gathered from this opinion what evidence should have been admitted or excluded.

. The order appealed from is reversed, and a new trial ordered.

Henshaw, J., and Temple, J., concurred.

Hearing in Bank denied.