delivered the opinion of the court.

The present action was originated by a verified complaint filed on January 12, 1914, by Antonio Rigo Sagrera in the *471District Court of San Juan, Section 1, against José Pon Eios, and alleging tlie following as material facts:

(а) That the defendant was the owner of the house numbered 48 on San Francisco Street of this city;

(б) That by a public deed of june 15, 1907, the plaintiff and the defendant, the latter being represented by Aureliano Ferrer, entered into a contract for the lease of the said house, ratifying and modifying a former private contract of November 2, 1906, at a rental of $45 a month, payable monthly in advance, for a period of five years beginning January 1,1907, and terminating on December 31, 1911;

(c) That by a private document of August 1, 1911, the said contract of June 15, 1907, was amended as regards the duration of the lease, which was extended to the last day of December, 1917, with a further condition that the water rent as well as the costs of repairs and improvements required by the Sanitary Department should be for account of the plaintiff without right to reimbursement. In the said private document the defendant acknowledged having received from Antonio Eigo the sum of $450 in advance on account of the rental of the house, which sum was to be deducted as follows: $150 from that of the last months of 1912; a like amount from that of the last months of 1913, and the remaining $150 from that of the last months of 1914, at the rate of $45 monthly;

(cl) That on September 1, 1911, Antonio Eigo advanced to José Pou y Eios the sum of $540 in payment of twelve months’ rental of the house at the rate of $45 monthly from September 1, 1911, to August 31,1912;

(e) That in May, 1912, the plaintiff learned that José Pou Eios, represented by Petronila del Carmen Eios y Berrios, widow of Toro, was negotiating for the sale of the house and, in fact, an agent or broker offered to sell the same to the plaintiff for $12,000, but he refused to accept the offer. A few days later, in the same month of May, José Toro Eios, as the representative of Petronila Eios y Berrios, who was the agent of José Pou y Eios, informed the plaintiff, at the *472.request and in the name of the said Petronila Bios y Berrios, that he was about to close a deal with Manuel Cerecedo for the sale of the house for the sum of $13,000, but that, nevertheless, he gave the plaintiff the option to purchase the same in preference to Cerecedo on the same terms, the option to expire at 3 p. m. of that same day;

(/) That Cerecedo confirmed the information and the plaintiff having shown Toro Bios the contract of lease entered into with José Pon Bios and asked him whether he was disposed to set out the existence of said contract in the deed of sale to Cerecedo with a covenant that the purchaser should respect the same, Toro Bios replied that he knew nothing of such a contract and was not inclined to recognize it, but would sell the property to Cerecedo without any condition whatever;

(g) That the plaintiff'had sublet the house to the industrial firm of Abraham & Bigo to December 31, 1917, for the same rental at which he had leased it from José Pou Bios, or $45 a month;

(h) That being obliged by the position in which he found himself either to have to purchase the house for the high price of $13,000 or to 'Suffer damages for the obligations contracted on the strength of the lease which he had entered into with José Pou Bios, the plaintiff decided to purchase the property and did so, executing for that purpose a provisional private deed of bargain and sale which was made a public instrument on May 13, 1912. He paid the vendor $4,000 in cash and agreed to pay the balance of $9,000 within a period of five years ending May 13, 1917, with interest at 10 per cent annually payable monthly when due, the property being mortgaged to secure the payment of the $9,000 plus the interest agreed on and $300 estimated as costs and attorney’s fees in case of foreclosure;

(i) That the Sanitary Department ordered certain sanitary improvements and additions to be made to the house and they were made pursuant to the terms and conditions of' the private contract of August 1, 1911, the costs of which *473amounted to a sum of more than $3,000. These improvements increased the value of the property and pnt José Pon Eios in a position to aslc $13,000 therefor, as he did;

(j) That if the contract of lease entered into between the plaintiff and José Pon Eios had continued for the period agreed on at the monthly rental of $45, the amount which he would have paid Pon Eios would be $4,274.97 less than the amount he will have to pay for interest at the rate of 10 per cent agreed upon in the deed of bargain and sale, and this sum added to the $3,000 paid for improvements makes a total of $7,274.97;

(k) That up to this, time, notwithstanding his extrajudicial demands therefor, the plaintiff has not been repaid, either by José Pon y Eios or his agents, Aureliano Ferrer and Pe-tronila Eios Berrios, the sum of $540 advanced on the rent or the $170.50 paid in advance for rent for three months and seventeen days, and these items, it is alleged, make a total of $620.50;

(l) That the plaintiff has made extrajudicial and friendly endeavors to procure from José Pou Eios an indemnity for the losses he has suffered on account of the non-compliance with the contract of lease and his most favorable answer has been to offer, through his representative, Petronila Eios y Berrios, the insignificant sum of $1,000, which offer was refused.

The complaint concludes with a prayer for- judgment to the effect that José Pou Eios was bound to respect and comply with the contract of lease referred to in the complaint and that, having failed to do so, he is required to repay the rental collected amounting to $620.50 and to pay the plaintiff the sum of $7,274.27 as an indemnity for damages, and that judgment be entered against him for the foregoing sums, a total of $7,894.77, or such part thereof as the court may deem just and proper, together with legal interest at 6 per cent per annum from the date of filing the complaint, and the costs, disbursements, and attorney’s fees.

*474Defendant José Pon Ríos demurred to the said complaint on the ground that it did not state facts sufficient to constitute a cause of action and the court, holding that the complaint stated facts sufficient to constitute a cause of action as regards the claim of $620.50 which, as alleged, the defendant owes the plaintiff, but not as regards the claim for $7,274.27, also asserted, the complaint containing, therefore, after limiting the claim to $620.50, a number of allegations which should be stricken out, entered an order on April 4 last directing that an amended complaint be filed within five days in accordance with its opinion.

Instead of amending the complaint the plaintiff, on May 4, moved that the ruling of the court of April 4 be entered as a judgment, with the proper formalities, so that he might appeal therefrom, and the court rendered judgment on May 8 dismissing the complaint with costs against the plaintiff, reserving to him his asserted right to recover the $620.50 which he alleged he had paid the defendant in advance for rent.

From the said judgment the attorney for the plaintiff appealed to this court and all formalities having been complied with, the same is now before us for consideration.

Let us see whether the facts alleged in the complaint are sufficient to constitute a cause of action. The complaint sets up two claims: First, restitution to the plaintiff by the defendant of certain sums which the former advanced on account of rent of house No. 48 San Francisco Street, which amounts have not yet been repaid; second, an indemnity .of $7,274 and some cents for sanitary improvements made on the property by virtue of the contract of lease and for damages caused the plaintiff by his being obliged to pay the defendant interest on the deferred instalments, according to the contract of bargain and sale, an amount greater by $4,274 and some cents than what he would have had to pay if the terms of the contract of lease at $45 monthly had been lived up to.

*475The facts set out under letters c, d, and k, althougb. stated in a somewhat confused manner and containing numerical errors, such as that $540 and $170.50 make a total of $620.50, undoubtedly show a cause of action based on the allegations that the defendant received money in advance on account of the rental of the house and failed to repay to the plaintiff the amount received. Nobody is entitled to enrich himself at the expense of another and if the facts alleged are true, as we must suppose them to be in considering the demurrer, the legal conclusion follows that the defendant is under obligation to repay to the plaintiff the amounts which the latter advanced him for rent and which have not been repaid.

The confusion in the allegation of the facts and the numerical error can be corrected by explaining and rectifying the same.

As regards the second claim for $7,274.27, based on the grounds indicated, we have carefully examined the-facts alleged in the complaint relative thereto and must conclude that they do not support such a claim.

According to allegations e and i of the complaint, the plaintiff made the sanitary improvements and additions ordered by the sanitary authorities for his own account .in ful-filment of the covenants made by the lessor and lessee in the private contract of August 1, 1911, therefore, under the lease he was not entitled to reimbursement of the sum of $3,000, the cost of said improvements, it being immaterial to the case whether the value of the property was or was not increased thereby. The fact that the defendant sold the house before the expiration of the lease and other allegations in the complaint with respect to the sale, create no right in the plaintiff to reimbursement of the said $3,000 nor of the $4,274 and some cents which the plaintiff claims as a reimbursement for interest on the deferred instalments of the purchase price and which he would not have paid if the .conditions as to the rent and duration of the contract of lease had been carried out as agreed upon.

*476If the defendant had sold the house to Cerecedo and the latter had not accepted the contract of lease, the lessee, Rigo Sa-grera, could have recovered from José Pou y Rios an indemnity for damages caused him under the provisions of sections 1457, 1459, and 1474 of the Revised Civil Code, which provisions the appellant cites as having been violated by the judgment ; but as the sale to Cerecedo was not made because Rigo Sagrera decided to take advantage of the preference or option which Pon Rios gave him and bought the property himself, it is evident that if he suffered any loss it was of his own volition by becoming a party to a deed of bargain and sale which never could have been executed without his consent. The plaintiff gave his assent and it is unattended by any defect which could invalidate it. The doctrine of scienti et vo-lenti non fit injuria applies to the present case and not the sections cited. Prom the moment Antonio Rigo Sagrera made the purchase he was estopped from claiming damages as a consequence of an act which was accomplished with his entire consent and was unaccompanied by force, intimidation, or fraud.

And it is not true, as contended by the appellant, that the action for damages does not arise from the deed of bargain and sale executed by the plaintiff and the defendant, but from the contract of bargain and sale which had previously been agreed, upon between Cerecedo and José Pou Rios, for that supposed contract did not attain legal existence because the plaintiff himself prevented the execution thereof by electing to purchase the house on the same terms offered to Cerecedo. In the present case Cerecedo acquired no title of ownership nor was there any right of legal redemption in the plaintiff, as contended by Mm, because the sale to Cerecedo was not made.

For the foregoing reasons the judgment appealed from should be affirmed.

, Affirmed.