The. lot in controversy is one of what are known as the “City Slip Lots, ” in the City and County of San Francisco. These lots were sold in 1853 under what purported to be an ordinance of said city. Subsequently it was decided by this Court in several cases that the alleged ordinance was a nullity, and that no title passed to the purchasers at the sale. The lot in controversy was purchased at this sale by one Buchanan at the price of sixteen thousand seven hundred dollars, which was fully paid. On the 17th April, 1862, the Legislature passed an Act which authorized the Board of Supervisors of said city and county to “ settle, compound, *551and compromise, and adjust” certain indebtedness arising from the claims of the purchasers, against the city, for the purchase money which they had paid; and, also, “to close, adjust, and settle all controversies respecting the title to said property known as the ‘ City Slip Property/ upon such terms as the said Board may deem just and equitable. ” The Act further provided “that in all cases where the purchase money had been paid for any of said lots, and the purchasers may elect to receive deeds for the same in lieu of any judgment recovered or claim for the return of the purchase money, the Mayor of said City and County of San Francisco is hereby authorized to make and execute deeds to such purchasers or their assigns without any additional consideration, which deeds shall convey all the title in said lots which the city and county has therein. ” (Stats. 1862, p. 265.) At the trial the plaintiff, after proving the original title of the city, put in evidence the above recited Act of the Legislature, and a deed to the plaintiff, dated October 15th, 1868, executed by the Mayor, which recited the sale to Buchanan in 1853, the payment of the purchase money, the fact that the sale was afterwards decided by this Court to be null and void, the assignment by Buchanan to the plaintiff of his claim to have the purchase money refunded, and that the plaintiff had elected to receive a deed for the lot in lieu of a return of the purchase money. After putting the deed in evidence the plaintiff rested and the defendant moved for a nonsuit on the ground: ‘First, that the action was barred by the Act of March 5th, 1864, generally known as the ‘ Hawes Limitation Act;’ second, that the recital in the deed to the plaintiff of the assignment from Buchanan is not sufficient to carry any such assignment. ” The motion for a nonsuit was denied, and the defendant thereupon put in evidence a deed to himself from the Tax Collector of the City and County of San Francisco for the lot in controversy, dated August 12th, 1867, which recited a levy and sale for State, *552city, and county taxes for the fiscal year 1866-7. The plaintiff, in rebuttal, proved that he was in possession of the lot in July, 1867. On these facts the Court entered judgment for the plaintiff, and the defendant having moved for a new trial, which was denied, appeals from the judgment and from the order denying a new trial.

If the tax deed put in evidence by the defendant was valid and operative to carry the title, the judgment is erroneous. It does not appear on what ground the Court below held the deed to be inoperative; nor have the counsel on either side discussed its legal effect. In the absence of aid from counsel on this point, we are left to surmise on what ground, if any, the deed is open to attack. When the lot was sold for taxes it was the property of the City and County of San Francisco, and it appears from the recitals of the deed that it was sold ‘‘for taxes due to the State of California, and to the County of San Francisco.” The property of a municipal corporation is not liable to taxation for municipal purposes. It cannot tax its own property. (Fall v. Marysville, 19 Cal. 391.) The tax for which the lot was sold, being illegal and void, the sale was a nullity, and the tax deed conveyed no title. (Hardenburgh v. Kidd, 10 Cal. 402; Bucknall v. Story, 36 id. 67.)

In making the deed to the plaintiff, the city and county was therefore dealing with its own property. The defendant had no interest in the question, whether the plaintiff was the assignee of Buchanan, and as such entitled to the conveyance. The parties in interest being satisfied on this point, a stranger to the transaction and to the title, having no privity with either party, will not be allowed to question the existence of a fact on which the parties in interest have acted in the exercise of a power conferred by statute. It was, therefore, not incumbent on the plaintiff to prove the assignment from Buchanan, otherwise than by the recitals of the deed.

*553The other points made by the defendant are untenable; and we deem it unnecessary to notice them more particularly.

Judgment and order affirmed.