The land contract in question was entered into on June 23, 1902, and was a contract for the sale of a farm situated in Pottawattamie county by Shields Bros, to one J. A. Plynn. It was recited in the contract writing that the said Shields Brtís. “ hereby agree to sell to the second party on the performance of the agreements of the second party as hereinafter, mentioned,” etc.; further, that said Plynn, “ in consideration of the premises hereby agrees to purchase . . . the real estate above described for the sum of $10,150. and to pay said sum therefor to the first party as follows: $500. on the execution of this agreement, $9,650. in three payments, 'to wit: Pirst payment, March 1, 1903, $1,500.; second payment, a note for $1,500., due May 15, 1903, interest from March 1, 1903; third payment, balance of $6,650. ... a mortgage on the above *561described premises running five years from March 1, 1903, with interest. . . . Deed to be delivered and possession given March 1, 1903. And the first party [Shields Bros.] shall pay all taxes ... on said property . . . for the year 1902.” It is then recited that, if default shall be made in payment, “ in consideration of the damage, injury, and expense thereby resulting . . . this agreement shall be void and of no effect, and the second ■party shall have no claim in law nor equity against the first party, nor to the above mentioned real estate; and any claim, or interest or right the second party may have hereunder .... or any payments made hereunder, shall on such default cease and determine and become forfeited without any declaration or act of the first party. . . . But if said sums of money and interest are paid as aforesaid . . . the first party will . . . execute and deliver a warranty deed to said premises as above agreed.”
„ 1. Contracts: vdtfSgby1 paro1, Shields Bros, appeared before the treasurer pursuant to notice, and, in writing, objected to an assessment on the grounds, first, that the contract between the parties, as evidenced by the writing and by the facts and j ° circumstances attending the making thereof, -was not intended or understood to be a contract of sale, or one creating an absolute indebtedness; that, on the contrary, it was a mere option, giving Flynn the right to purchase in the future on the terms and conditions specified, and that it was so intended and understood by the parties thereto; second, that an assessment based on said contract as an item of credit would result in double- taxation. And it was upon the issues as thus outlined that the case was tried below and is now presented in this court. The hearing was had in the district court as in equity, and on such hearing the appellants brought into the record proof of the circumstances attending the making of the contract. Each of the respective parties to such contract were called to the stand, and, over objections as to competency, etc., *562testified that it was their understanding that a mere option to purchase was all that was in contemplation and being granted; that they informed the scrivener that such was their contract, and supposed he had so written. A contract rests in the intention of the parties thereto. It is true by general rule that, where the contract has been committed to writing, the nature and extent of the undertakings must be ascertained by an inspection of such writing. Oral evidence is not allowable to work a change or variance in the terms, conditions, etc., as fairly expressed by the writing. But this rule is enforced only where a controversy arises between the parties to the contract or their privies. As against a stranger to the contract,' a party thereto may assert that the agreement was other or different — in any respect and to any extent — than that which the writing imports. Livingston v. Stevens, 122 Iowa, 63; Logan v. Miller, 106 Iowa, 511; Roberts v. Bank, 8 N. D. 474 (79 N. W. 997); 11 Am. & Eng. Ency. 548, note; Page on Contracts, section 1196 eb seq.
2. Taxation option contract for sale of land. Now, it may'be doubted if the writing here in question imports a sale. In terms the agreement is for a sale — not an agreement of sale. There was to be no change in possession in virtue of the contract, and the appellants were to pay the taxes on the lands for currei;it year. Moreover, if Elynn failed to present himself on March 1st following, and make payment, etc., the money paid as of the date of the contract was to be regarded as forfeited, and all his rights should at once, and without action on the part of appellants, cease and determine. But, however this may be, we must treat the contract as one granting only the right to exercise an option. The parties to it so intended and understood; and, as we have seen, all other parties are concluded from asserting that it was other or different. And as against a stranger •it is not necessary that the writing he reformed in an action brought for that purpose before the real contract can be *563asserted and made the basis of a recovery or defense. Logan v. Miller, supra. Now, an option is not a contract to pay. It creates no enforceable indebtedness on the part of the person to whom it is granted. Hopwood v. McCausland, 120 Iowa 218; Warvelle on Vendors, section 125. And, this being true, there cannot arise ont of such a contract a taxable credit within the meaning of the tax laws of the State.
We conclude that the court below was in error in sustaining the assessment as made by the county treasurer, and accordingly the judgment appealed from must be, and it is, reversed.