This action was commenced September 15, 1877, by David Porter against Christian Muller to foreclose a mortgage executed by Christian Muller and George Kroeckel on two adjoining quarter sections of land, of which they were equal owners as tenants in common, to wit, the northwest quarter of section 28, and the northeast quarter of section 29, township 2 north, range 8 east, Mount Diablo meridian, to secure their joint debt of $3,000 and interest. Upon the death ,of each original party, pending the action, his legal representative was substituted. The case has been before this court on two former appeals, in each of which a judgment in favor of plaintiff was reversed. (Porter v. Muller, 53 Cal. 677 ; 65 Cal. 512 .) The record on the present appeal presents the following undisputed facts:

*358 Muller and Kroeckel had purchased the land above described from G. H. Tarr, for the price of $8,000, paying one-half in cash, and executing their mortgage to Tarr to secure the balance of $4,000.

Thereafter, February 28, 1874, Kroeckel mortgaged his undivided half of the land to David Porter (plaintiff) to secure his individual indebtedness to Porter in the sum of $4,000, and interest to accrue thereon at the rate of ten per cent per annum, payable quarter-yearly.

On September 2, 1875, Muller and Kroeckel, having paid $1,000 and all interest on their mortgage debt to Tarr, borrowed $3,000 from Porter, and paid the same to Tarr, in full satisfaction of their mortgage to him; and, at the same time, to secure Porter for said loan, made their joint note to him for $3,000, payable two years after date, with interest at the rate of one per cent per month, and to secure this note executed the mortgage in suit.

Thereafter, on July 13, 1876, Kroeckel again mortgaged his undivided interest iii the land to Porter, to secure his individual debt to the latter in the sum of $1,404.25, this debt being additional to his debt of $4,000» secured by said mortgage of February 28, 1874.

On September 30, 1876, Porter commenced an action against Kroeckel to foreclose the $4,000 mortgage of February 28, 1874, on Kroeckel’s undivided half of the land. While the last-mentioned action was pending, to wit, on November 9, 1876, a compromise agreement was made between Porter and Kroeckel to the effect that Kroeckel should convey to Porter all right, title, and interest of the former in and to the two quarter sections above described; that in consideration of such conveyance Porter should release and discharge the $4,000 mortgage and debt (which debt, with interest, then amounted to $4,080) and dismiss the action to foreclose that mortgage at his own costs, and should also release and discharge the subsequent mortgage of July 13, 1876, and the debt of $1,404.25 thereby secured. This agreement was then (November 9, 1876) completely executed by *359 both parties thereto. At that time Kroeckel was considered insolvent, and the court found that he died in. August, 1877, leaving no estate, real or personal.

Thereafter, on December 15, 1876, Porter, by deed, granted to Hiram H. Jones the undivided half of said, land which had been conveyed to the former by Kroeckel as aforesaid, the deed to Jones reciting a consideration of $5,600, and containing a covenant on the part, of Porter that the land conveyed should be forever free from the lien of the $3,000 mortgage of September 2, 1875, executed to Porter by Muller and Kroeckel as aforesaid. It is admitted by respondent that the consideration paid by Jones to Porter was $5,600 as recited in the deed, whereas appellant contends that it was $5,700.

On April 7, 1887, Muller and Jones partitioned said land, by making conveyances to each other, the effect of which was to give the quarter of section 28 to Jones, and quarter of section 29 to Muller. Since the commencement of this action Jones conveyed the quarter of section 28 to the defendant, Charles Grupe.

The object of this action is to enforce the $3,000 mortgage of September 2,1875, executed by Muller and Kroeckel on both quarter sections, against the interest of Muller alone, as changed by said partition, to wit, against the northeast quarter of section 29; and also to obtain a judgment against Muller’s administratrix alone, for any deficiency after application of the proceeds of the sale of said northeast quarter of section 29.

Fifteen days before the action was commenced, to wit, on August 31, 1877, Muller tendered to plaintiff, Porter, $1,680, that being one-half of the amount then due for principal and interest on the mortgage note, as full payment of the proportion which he (Muller) was liable to pay, and kept the tender good. Plaintiff then refused to accept the tender as full payment, but afterward, on October 5, 1878, accepted it as a credit on the mortgage debt.

Jones, who purchased from Porter the Kroeckel inter *360 est in the land, and Grape, who purchased the quarter of section 28 from Jones, were made parties defendant, but both failed to answer, and their defaults were entered.

On July 14, 1884, Muller conveyed the northeast quarter of section 29 to his wife, Charlotte Muller. She was, therefore, made a party defendant individually as well as in her character of administratrix; and in both capacities she answered plaintiff’s complaint, and also filed a cross-complaint with the object of clearing her title to the northeast quarter of section 29 from the cloud cast upon it by the mortgage in suit. The cross-complaint was answered by plaintiff, though the facts therein alleged, so far as material, were legitimate matters of defense.

The court found the facts herein above stated, with others claimed by respondent to be material (which will be considered hereafter), and therefrom deduced the following conclusions of law:

“As conclusions of law from the foregoing facts, the court finds that the plaintiff is entitled to have and recover from the defendant Charlotte Muller, as administratrix of the estate of Christian Muller, deceased, the amount due and unpaid upon the note mentioned in finding V, to wit: For the principal sum of three thous- and dollars ($3,000.00), with interest thereon from the 2d day of September, a. d. 1876, at the rate of one per cent per month, less a credit of the sum of sixteen hundred and eighty dollars ($1,680.00), as paid October 5, 1878, said principal and interest to be paid in gold coin of the United States, together with the plaintiff’s costs of this action, and the sum of three hundred dollars ($300 00), in like gold coin, as her attorney’s fee; and that the mortgage mentioned in finding V is a lien upon the northeast quarter of section twenty-nine (29), township two (2) north, range eight (8) east, Mount Diablo meridian, to secure the payment of the said amounts found to be due to the plaintiff; and that the plaintiff is entitled to have the said mortgage foreclosed, and the *361 said northeast quarter of the said section twenty-nine (29) sold by an officer of this court, and the proceeds applied in paying the said amounts found due to the plaintiff.”

The judgment is in strict accordance with the conclusions of law, being a judgment against Charlotte Muller as administratrix of the estate of Christian Muller, deceased, for the sum of $6,599.58 in gold coin, to be paid in due course of administration, to which is added an order and decree that the northeast quarter of section 29, township 2 north, range 8 east, Mount Diablo meridian, be sold, and that from the proceeds of the sale, less the costs and expenses thereof, the sheriff “pay to plaintiff or her attorney the sum of $6,599.58 in gold coin of the United States (that being the amount of said judgment), with interest thereon at the rate of seven per cent per annum from the date of this decree, or so much thereof as the said proceeds of sale will pay.”

The defendant, Charlotte Muller, as administratrix, and individually, appeals from the judgment and from an order denying her motion for a new trial.

On the facts thus far stated it seems clear that the judgment is erroneous.

Plaintiff's $4,000 mortgage of February 28, 1874, was the prior lien on Kroeckel’s interest, and, if necessary, might have exhausted that interest and thereby have thrown the whole burden of the $3,000 mortgage of September 2, 1875, upon Muller’s half of the land; but if the value of Kroeckel’s half of the land was more than sufficient to satisfy his prior individual mortgage thereon, then the surplus should have been applied to the subsequent joint mortgage of Kroeckel and Muller, to the extent of one-half of the joint mortgage debt for the payment of which Kroeckel was legally and equitably bound, unless such application of the surplus could not have been made consistently with the rights of plaintiff. “Equity requires equality in support of a common burden”; and, as between Kroeckel and Muller, their joint mortgage to plaintiff was a common and equal burden. *362 the equality of which the plaintiff, having notice thereof, was not at liberty to disregard or disturb as he did by discharging that mortgage as to Kroeckel’s half of the mortgaged land, and attempting to enforce it against Muller’s half alone, when he necessarily had notice of the mutual rights and equities of Kroeckel and Muller. (Stevens v. Cooper, 1 Johns. Ch. 425 ; 7 Am. Dec. 499 ; Cheesebrough v. Millard, 1 Johns. Ch. 415 ; 7 Am. Dec. 494 ; Parkman v. Welch, 19 Pick. 238 ; Ingalls v. Morgan, 10 N. Y. 188 ; Denman v. Prince, 40 Barb. 217 ; Stuyvesant v. Hone, 1 Sand. Ch. 129 ; Birnie v. Main, 29 Ark. 591 ; Webb v. Meloy, 32 Wis. 319 .) In Stevens v. Cooper, supra, Chancellor Kent said:

In Webb v. Meloy, supra, the defendant, being prior mortgagee, purchased the mortgagor’s title or equity of redemption, for which he paid $125, and also paid two years’ back taxes. Four months thereafter he conveyed the mortgaged premises to Plain for a sum sufficient to satisfy his prior mortgages, repay the sums he had paid for the equity of redemption and for taxes, and also to satisfy plaintiff’s subsequent mortgage to foreclose which the suit was brought. The lower court decreed a foreclosure of plaintiff’s subsequent mortgage and ordered that it he first satisfied from the proceeds of the foreclosure sale, and the supreme court affirmed the judgment, saying, among other things: “ What difference can it make that, instead of foreclosing, Meloy purchased the equity of redemption, and then sold the premises at private sale for a sum sufficient to pay off and discharge all of the encumbrances? We can perceive no difference in principle in the two methods, and we think that the circuit judge held correctly that equity will, under the circumstances of this case, regard the sale to Plain for $2,025 as equivalent to the sale of the premises for the same sum on a foreclosure of the prior mortgages. This principle seems so manifestly just and equitable that argument is scarcely needed in support of it. ... . The substance of the whole matter is that Meloy has received money (or its equivalent) which equitably he ought to apply in payment of plaintiff's mortgage.” The substance of the whole matter in the case at bar is that Porter has received money (about $1,500), in excess of- what was due him on his prior *364 $4,000 mortgage, which excess he ought to have applied as a payment by Kroeckel on the mortgage in suit.

That excess is admitted to have been received by him on the fifteenth day of December, 1876, nine months before this action was commenced, and should be credited on the subsequent joint mortgage of Kroeckel and Muller (the mortgage in suit) not later than that date. If, however, the land purchased by Porter from Kroeckel was of greater or less value than $5,600, the credit should be correspondingly increased or diminished. (Cheesebrough v. Millard, supra.) But according to the case of Webb v. Meloy, supra, the credit, in the absence of proof of greater or less value, should equal the price actually paid to plaintiff «by Jones. The pleadings raise an issue as to the value of Kroeckel’s half of the mortgaged premises, and there was considerable evidence applicable to that issue, but no finding upon it by the court.

I do not understand that counsel for respondent controverts either the facts or the law as above stated; but he claims that the court below found material additional facts, which, together with those above stated, support and justify the judgment.

The only additional findings, upon which it is claimed that the judgment may stand, are, in substance, that at the time of the .compromise agreement between Porter and Kroeckel (November 9, 1876) Muller consented thereto and then verbally “undertook and promised, in consideration of the benefit he was to receive by and under the said mutual arrangement, and in recognition of his duty and legal obligation in the premises, that he would himself pay the whole of the note mentioned in finding 5 (joint mortgage note of Kroeckel and Muller), and that his undivided one-half of the said land should stand security for the payment of the whole of the said note”; that Porter, though at first unwilling to make the compromise with Kroeckel, “finally consented to accept such a deed [from Kroeckel] and dismiss the said foreclosure proceedings [on Kroeckel’s $4,000 mortgage] *365 only because he relied upon the said representations of Muller; that his [Porter’s] rights under the note and mortgage mentioned in finding 5 would not, and should not, be affected or prejudiced by his accepting such a deed from Kroeckel, and that the said Muller would himself be bound to pay the same in full”; and that, but for such representations and promises of Muller, “ Porter would not have dismissed the said foreclosure proceedings, but would have prosecuted the same to a final judgment and decree, and would have caused the interest of said Kroeckel in said tract of land to be sold thereunder, and the proceeds applied in satisfaction of said individual indebtedness of said Kroeckel.”

Though the findings cover twenty pages of the printed transcript, a comparison of the foregoing with the findings contained in the transcript on the last former appeal will show all that is materially peculiar to the findings on this appeal, or, in other words, all that is materially different from those on the last former appeal; and the only substantial difference is that on the present appeal it is found that “in consideration of the benefit he was to receive by and under the said mutual arrangement, and in recognition. of his duty and legal obligation in the premises,” Muller verbally undertook and promised that he would pay the whole of said note; whereas the ultimate fact of such undertaking or promise was not expressed, and was held not to be implied, in the findings on the former appeal. (See Porter v. Muller, 65 Cal. 516 .) In all other respects the findings on this appeal relating to the oral agreement are substantially the same as they were on the former appeal.

On the former appeal it was, in effect, decided that the legal effect of the mortgage of Muller and Kroeckel to Porter was not, and could not have been, changed to the prejudice of Muller by any merely oral agreement between Muller and Porter. On the second former appeal it was contended by respondent that the findings on that appeal were to the effect that Muller had assumed and agreed to pay the whole mortgage debt; *366 but the court, after concluding that the findings could not be so construed, added: “If he had expressly agreed orally that his cotenant’s share of the land should be relieved of the mortgage, and that his own should bear the whole burden, such oral agreement would have been of no effect” (citing Civ. Code, sec. 2922); that is to say, at least, that such agreement could not have had the effect to place upon Muller’s share of the mortgaged land any burden additional to that imposed upon it by the written terms of the mortgage. As the oral agreement was pleaded and claimed to have been proved and found as a fact, the question of law as to its legal effect, as well as the question as to whether it had been found as a fact by the court, was properly presented for decision; and the court having concluded that the agreement had not been found as an ultimate fact, and that a new trial should be granted, it decided the question of law as to the legal effect of the agreement, for the guidance of the lower court on the new trial, thereby preventing the necessity of another appeal to settle that question. Therefore, the decision that the alleged oral agreement, even if proved and found as a fact, “would have been of no effect,” is to be deemed the law of the case on this appeal, even though the decision of that question was not absolutely necessary on the former appeal. (Table etc. Co. v. Stranahan, 21 Cal. 549 ; Leese v. Clark, 20 Cal. 388 ; Gwinn v. Hamilton, 75 Cal. 265 .)

Furthermore, it is not at all clear that the oral promise or agreement, as found on the last trial, purports to add anything to the pre-existing “ legal obligation,” “in recognition” of which it is found to have been made. His recognition of a greater obligation than that imposed by the note and mortgage could not have enlarged or changed the obligations created by those instruments. As said by this court on the former appeal: “ If he was informed and understood that he would become liable for the whole $3,000 note, as the consequence of facts from which no such liability arose, such information and understanding did not make him liable.” Besides, *367 if Muller received any benefit “by and under said arrangement” (between Porter and Kroeckel) not necessarily and merely incidental thereto, or from his lease from Porter, and in consideration of such benefit he orally promised to do or pay anything which the note and mortgage did not oblige him to do or páy, any obligation thereby created was entirely distinct from those arising from the note and mortgage, and, being merely oral, could not have been secured by the mortgage; and, so far as the ground of such additional obligation is alleged in the complaint, it is therein stated as a distinct promise of Muller, made in consideration that Porter should pay the taxes on his own half of the land purchased by him from Kroeckel, for the then current year, and should lease his said half of the land to Muller during the ensuing cropping season, at the rental of one-fourth of the crop. But it is not clearly apparent that Muller received any benefit or that Porter suffered any detriment from “ said arrangement,” lease, or payment of taxes, which can be deemed a valuable consideration for Muller’s distinct, oral promise to pay the whole debt; since Porter was bound to pay the taxes on his undivided half of the land, and the stated terms of the lease imposed upon Muller no other obligation than to pay the stipulated rent.

Again, it is not alleged, and does not appear, that any claim on this distinct oral agreement was ever presented for allowance to the administratrix of Muller’s estate, although it is alleged in the amended supplemental complaint that the plaintiff’s claim, founded on the note and mortgage, was, in due form, so presented on July 6,1886, and is further alleged “ that the said claim so presented arose and was founded upon the contract, to wit, the note and mortgage set forth in plaintiff’s original complaint herein.”

On this branch of the case my conclusion is, that the alleged oral agreement does not change nor affect the rights of the parties in this action, and should be excluded from consideration as a factor in the case. *368 I think the judgment and order should be reversed, and the cause remanded for a new trial on the following issues only: 1. As to the value of Kroeckel’s undivided half of the mortgaged premises on the ninth day of November, 1876, when plaintiff purchased that half; 2. As to the amount of costs paid by plaintiff on .his dismissal of his action against Kroeckel to fdreclose the prior $4,000 mortgage; 3. As to the amount of taxes paid by plaintiff on Kroeckel’s half of the land after his purchase thereof, which were a lien upon the land at the time of the purchase; 4. As to the amount of principal and interest due and unpaid on the prior $4,000 mortgage on November 9, 1876. These being found, the sum of the last three, namely, said costs, taxes, and amount of principal and interest due on the $4,000 mortgage, should be subtracted -from the value (as found) of Kroeckel’s half of the land on November 9, 1876, and the remainder of such value, if any, to the extent of one-half of the mortgage debt, should be credited on the mortgage note in suit, as of November 9, 1876. The $1,680 tendered by Muller on August 31, 1877, and afterward accepted by plaintiff, should be credited on the note in suit as of the date of such tender. If, after allowing these two credits, there shall be found any unpaid balance due plaintiff on the note and mortgage in suit, he will be entitled to a judgment of foreclosure for such unpaid balance, and no more.

Searls, C., and Haynes, C., concurred.

For the reasons given in the foregoing opinion the order and judgment appealed from áre reversed, and the cause is remanded for a new trial in accordance with and as limited in said opinion.

McFarland, J., Temple, J., Henshaw, J.

Hearing in Bank denied.