— I. The cause was heard in the court below upon oral testimony. It is claimed by appellant, and conceded by appellee, that it is properly triable by the first method of trying equitable issues. Henderson v. Legg, 16 Iowa, 487.

Appellant insists that by stipulation the evidence was reduced to writing by the court, and, with the exhibits, was to be taken as the record. He does not state that the cause was to he i/ried by the second method. The stipulation referred to is not incorporated into the abstract.

Appellee claims that there was no agreement as to the mode of trial, and that the stipulation was only to make the pleadings, evidence and exhibits records in the case.

We regard the case, therefore, as tried by the first method, reviewable here de novo, and the error in the admission of oral testimony was waived by the failure to object thereto at the time of its introduction. State v. Orwig, 27 Iowa, 528.

*62II. The plaintiff asks that, if it be found that John Mally is identical with John Morlie, the judgment defendant, the discharge of the first mortgage be canceled, and the same be re-instated. He claims the relief upon the alleged ground that when he entered satisfaction of the first mortgage, he was not aware of the existence of the judgment in favor of Bradish. Appellee insists that the circuit court has no jurisdiction of this branch of the case. Section 4, chapter 86, Laws 12th General Assembly, confers upon the circuit court jurisdiction of foreclosures of mortgages. The foreclosure of a mortgage is triable by the second method of determining equitable issues, in which the cause is heard upon oral testimony, tried by jury, if either party so elect, and reviewed, on appeal, upon errors of law, duly excepted to and assigned. Rev. §§ 2999, 3000. It is thus seen that a proceeding to foreclose a mortgage, though denominated as the “ second method of equitable trials,” in fact partakes of all the essential elements of a trial at law.

We are of opinion that the statute, which confers upon the circuit court jurisdiction over foreclosures of mortgages, has reference to the above method, which is the ordinary and usual procedure in such cases. When, however, as preliminary to a foreclosure, it becomes necessary to determine that satisfaction of the mortgage has been entered through mistake, and to cancel such satisfaction, the case becomes one of purely equitable cognizance, triable by the first method of determining equitable issues, and subject to all the provisions which apply to that mode of trial. In such, cases relief from the mistake is the substantive remedy, and the foreclosure of the mortgage is merely ancillary. See Henderson v. Legg, 16 Iowa, 484. General equity jurisdiction has not been conferred upon the circuit court, and, in our opinion, it cannot be maintained in this case from the fact that, as an incident to the relief sought, the foreclosure of a mortgage is asked. That such juris*63diction was entertained by tbe court below is quite apparent from tbe decree. Tbe court ordered against A. Bradisb a foreclosure of tbe first mortgage, less a given credit. If tbe court had found that Bradish’s judgment, as against the plaintiff, was not a lien upon tbe mortgaged premises tbe foreclosme would have been for tbe amount of tbe second mortgageand if the court bad not found that satisfaction of tbe first mortgage was entered through mistake, it could not, as against A. Bradish, have been foreclosed. For tbe error of tbe court, in assuming an unauthorized jurisdiction, tbe judgment must be reversed.

The cause will be remanded to tbe circuit court, with leave to tbe plaintiff to waive bis claim as to tbe foreclosure of tbe first mortgage, and to prosecute bis action upon the second, or to submit to a nonsuit and institute proceedings in tbe district court, as be may be advised.

Reversed.