The motion made on the part of the defendant, Robert H. Champlin, is, that he be permitted to amend his answer in this material respect: that whereas, as it now stands, his answer admits that he is accountable to the complainant, as receiver of the late firm of Gardner & Brother, for the proceeds of the sale at auction of a portion of the property of that firm, he desires so to amend it, that it may discharge him from so accounting, by alleging a payment of the proceeds of said sale to Benjamin W. Gardner, the surviving partner of the firm, when entitled to receive such payment. The grounds for this motion, in part disclosed in the affidavits of the respondent, on whose behalf the motion is made, and of Joseph M. Blake,'Esq. his counsel, are, first, the written stipulation of April 21,1856, that in consideration of the consent given by the defendants that the complainant should amend his bill, the defendants should have leave to amend their answer ; and second, the fact sworn to by Mr. Blake that he was so ill when he drew the answer, then due and called for by the counsel for the complainant, as to be wholly unfit for such work; that the answer drawn under such circumstances was handed directly to the counsel for the complainant, who kept it, so that it was not again seen by the affiant, until just before the commencement of this term; and that, on the first day of the term, he gave notice of his motion to amend it in the important particular above stated. The objections made to the amendment are, that the stipulation related only to such amendments of the answer as \yere rendered necessary by the amendments to be made by consent to the bill, — the long delay to make it, and the fact that the amendment will change the whole aspect of the cause, — and that, too, at a very late stage of it, when the proofs, at least on the part of the complainant, have been taken, and the cause, as is contended, though not set down for, was, by the rules, ready for hearing.

*131 The question is, whether the motion to make this amendment can, under such circumstances, be granted by us, consistently with the rules of practice given to or adopted by us, for our guidance as a court of equity, in the exercise in such a matter of our discretion ?

It is certainly true, that when application is made to amend an answer as to material facts, or to change essentially the grounds of defence originally taken in it, courts of equity are exceedingly slow and reluctant in acceding to the amendment. The reason given is twofold; to permit it, has a natural tendency to encourage carelessness and indifference in making answers, and leaves much room for the introduction of testimony manufactured for the occasion. Per Story, J., Smith v. Babcock, 3 Sumn. 585, 586. The last reason operates with great force, when the motion, as here, is made in a late stage of the cause, and when, of course, the exigencies of it are fully seen as well by the respondent as by his solicitor. At the same time, it would be a reproach to a court of chancery if its rules were such as to strip it of authority to grant leave to file an amended answer, in cases where it can be safely done, and where the purposes of substantial justice require it; and the whole matter rests in the sound discretion of the court. Ibid. Under the circumstances of Livesay v. Wilson, 1 Ves. & Bea. 149, Lord Eldon allowed a defendant to a bill for a specific performance of a contract for the purchase of real estate, to amend his answer, by stating that he took possession of only a part of the estate wider the articles of sale, although the answer admitted that, under them, he took possession of the whole; the fact being, as the respondent stated in his affidavit, that he was in possession, at the time of the contract, of the house, one part of the property purchased, as tenant of the vendor, and that the mistake arose from the respondent’s ignorance of the difference, the truth of the matter not having been communicated by him to his solicitor. As the mistake alleged was not in matter of fact, but in matter of law, Lord Eldon was very unwilling to make the precedent of allowing it to be corrected, and did so, only on the condition that the respondent would tell him “ on his oath, that, when he swore to his original answer, he *132 meant to swear in the sense which he now desires to be at liberty to swear to.” In Patterson v. Slaughter, 1 Ambl. 291, Lord Hardwicke allowed the respondent, — the motion being made before replication filed, — to amend his answer by setting forth therein a newly discovered title to the real estate in question of the person under whom he claimed, not before alleged in the answer, so as to be capable of being proved; noticing that the fact was not denied, and that unless the amendment were permitted, the respondent could have no remedy; since, a bill of review with supplemental matter would relieve only where the new matter offered upon it went to prove what was already in issue, whereas, the new matter offered in the case before him, required to prove it, a new issue to be made by the answer. He noticed, further, that the title, which was that of a purchaser for valuable consideration, could not be availed of on a cross bill, for the double reason, that such a title though a good defence, was no ground for relief, and that the proofs in the cross cause could not be made use of in the original cause* the same matter not being in issue. Though “ afraid,” as he expressed it, “to give encouragement to applications of this kind,” he allowed the amendment, as the only remedy which could avail the party under the circumstances of his case. That an admission in an answer by mistake qannot be remedied by a cross bill, but only by amendment of the original answer, see also, Berkley v. Ryder, 2 Ves. senior, 537. A defendant has been allowed also to amend his answer to a bill for the specific performance of a contract for the sale of an estate made by him, after having submitted -in his answer to perform his contract, by setting up in his answer a surprise in the 'sale ; he having newly discovered that in ignorance he had sold the estate at several thousands pounds under value; Alpha v. Payman, 1 Dick. 33; and in another case, nearer to the one before us, by limiting cm admission of assets made by him through mistake. Dagley v. Crump, 1 Dick. 35. On the other hand, where an attorney had, as respondent to a bill, admitted in his answer that he had certain documents in his possession, and desired permission to file a supplemental answer retracting his admission, permission was refused, on the ground that such an applicant must have been *133 aware of the consequences of his admission, and that, as there was nothing in the shape of written document to support the retraction, its truth could not, as in most of the cases in which amendments had been permitted, be put beyond doubt. Greenwood v. Atkinson, 4 Sim. 54, 63, 64; 6 Eng. Cond. Ch. R. 54, 63, 64. In fine, without detailing more of the adjudications upon this subject, it will be found in the language of Chancellor Kent in Bowen v. Cross, 4 Johns. Ch. R. 375, that chancellors proceed in the matter upon the idea “ that the application ought to be narrowly and closely inspected, and a just and necessary case clearly made out;” being greatly swayed to grant the motion, by facts affording some probable reason to suppose, as from the haste in which the answer was made, or the like, that the answer is wrong by mistake, and that no gross negligence has been the cause of it, as well as by the fact, that there is such kind and degree of proof of the truth of what is proposed to be alleged by way of correction or addition, as places the truth of it beyond reasonable doubt. See remarks of Knight Bruce, V. C., in Swallow v. Day, 2 Collyer, 33 Eng. Cond. Ch. R. 133, and see that case and cases cited in it. See Greenwood v. Atkinson, sup., remarks of Sir Launcelot Shadwell, V. C. of England, and cases cited; and see Smith v. Babcock, sup., and cases cited.

The tests proposed b^ Mr. Justice Story, in the case last cited, for giving leave to amend an answer, are, that the reasons must be satisfactory, — the facts highly probable, if not certain, and material to the controversy, — that there must have been no gross negligence, — and that the mistakes must have been ascertained since the putting in of the answer. Smith v. Babcock, 3 Sumn. 586.

Applying these tests to the motion before us, the reason for the omission in question by the solicitor, from his illness and the hurry in which, unfit as he was from illness, to prepare the answer to meet the urgency of the counsel for the complainant, is satisfactory to us. It' is clearly no case of gross negligence, under such circumstances of combined illness and haste to make up for delay caused by illness. That the application was not made before, is accounted for by the fact that the answer has been in the possession of the counsel for the complainant until. *134 just before the coihmencement of this term, so that the solicitor for the defendant did not until that time see it, and discover the omission he had made ; and it appears that on the first day of the term, he gave notice of this motion, and of the fact which he proposed to add in his answer. These facts, coupled with the affidavits before us, prove also that the omission was not discovered until after the answer was put in, and, indeed, not until just before this application was made. With regard to the fact itself, it is vitally material to the controversy involved in this suit; and what is of the last consequence, is admitted by the counsel of the other party to be true, he having used this very fact before this court, to the knowledge of the judges then present, in another branch of the litigation which has sprung up out of the affairs of the late firm of Gardner & Brother. But if this, were not so, it is a fact, the making of a certain deposit in bank, capable of proof, and which can only be proved by the officers of a bank, and by the entry or entries in the books of a bank, made at the time of the deposit. Again, though it materially alters the posture, of the case, it is perfectly consistent with what the answer already states; adding a new defence only to that before alleged in the answer. Under these circumstances, there being, as we have seen, no other remedy for the mistake, but the granting of leave to file a supplemental answer .adding the statement of the fact omitted, we deem that substantial justice requires us, notwithstanding the late stage of the cause in which the motion is made, to grant the leave asked of us. With regard to the stipulation of April 21, 1856, “ that the defendant shall be permitted to amend his answer, if deemed necessary,” the language certainly does not confine the leave to amend to what may be necessary to meet the new allegations of the amended bill; but, on the contrary, places the right of deciding upon the amendments necessary, entirely with the counsel for the respondent. Without doubt, however, if a party would avail himself of such a stipulation, he must do so within a reasonable time, and not allow the cause to proceed in proof, under the idea that the answer is what it is intended to remain. We therefore give to the stipulation but very little weight in this motion, except so far as it countenances the statement in *135 Mr. Blake’s affidavit, that the answer was drawn under such circumstances as to lead him to fear that amendment of it might be necessary. As to the stage of the .cause in which the motion is made, there seems to be no limit to the time within which such an application may be granted, so that the plaintiff may be placed in the same situation that he would have been in had the answer been correct or full enough, at first. 2 Danl. Ch. Pl. & Pract. 916. By the English practice, as appears from the case of McDougall v. Purrier, 4 Russ. 4 Eng. Cond. Ch. R. 486, 487, the motion comes too late, after the cause is set down for hearing, and for the reason stated by the chancellor, “ that it was impossible to put the plaintiff in the same situation as he would have been in, if this defence had been stated on the record in due time.” This cause, however, has in no sense, under our practice,'been set down for a hearing. So far from it, the counsel for the respondent gave notice, before the commencement of the term, that his testimony was not closed, or that he might wish to take further evidence; and, on the first day of the term, gave notice of this motion. We have no special rule of our own, applicable to the subject of the amendments of answers ; and in such case have expressly adopted the rules in equity established by the supreme court for the courts of the United States. The sixtieth of these rules implies, beyond question, that an answer may be amended “ in material matters, as by adding new facts or defences, or qualifying or altering the original statements,” upon “ special leave of the court or of a judge thereof, upon motion and cause shown, after due notice to the adverse party, supported, if required, by affidavit,” not only after replication filed, but even after the cause is set down for a hearing upon bill and answer.

This cause has proceeded much further than an answer, and proofs may have been taken, or omitted to be taken, which, had the answer been as it is to be when amended, would have been omitted, or would have been taken, by the complainant. To place the complainant in the same condition as he would have been in had the answer been full at first as to all defences, the time for taking proofs must certainly be extended, and the commission opened for that purpose, if the time limited by the rules *136 has expired. The terms, too, as to costs of the suit as well as of the motion, upon which the application is granted, must be reserved until the hearing, for the purpose of enabling us to do justice to the complainant, when granting this application of the defendant. We can then better, and with more ease, ascertain what the complainant has suffered in the matter of proofs taken, or to be taken, from the omission of the answer, and act more advisedly than we can now do, as to the costs of those proofs.