The Stoneman-Zearing Lumber Company (a corporation) owned a tract of timber land in White County, Arkansas, containing about 15,000 acres, and on September 20, 1906, entered into a written contract with appellee whereby it gave the latter an option to purchase the persimmon timber on said land. This is a suit instituted by appellee to compel specific performance of the contract, and after its institution appellant, Fannie M. Zearing, was appointed as receiver of the Stoneman-Zearing Lumber Company, and substituted as defendant. The contract (omitting' caption) reads as follows:
“That the Stoneman-Zearing Lumber Company, a corporation created as aforesaid, and doing business as aforesaid, in consideration of one hundred dollars to it paid, * * * do hereby sell, give and grant to the said Clarendon Last Block Works, H. S. Matthewman, general manager, an option on all of the persimmon timber upon the following described lands, *577lying and being situate in White County, Arkansas, towit: (here follows description) for a period of thirty days from date hereof, with the privilege of an extension for thirty days longer, in case of overflow or sickness.
“It being expressly agreed and understood that the said Stoneman-Zearing Lumber Company is to furnish at its expense a man to assist in estimating said persimmon timber on said land, and the said H. S. Matthewman, general manager of the Clarendon Last Block Works' is to furnish at its expense a man to represent it in the estimation of said timber, and that the expenses for boats, provisions, additional help, etc., while estimating and in estimating said timber, is to be borne equally by each of said corporations, and that, as soon as said estimate is made and agreed upon by the parties representing each of said corporations, the said H. S. Matthewman, general manager of the Clarendon Last Block Works, or the Clarendon Last Block Works, are to pay to the Stoneman-Zearing Lumber Company three dollars per thousand feet for said persimmon timber, according to the estimate agreed upon.
“It being expressly agreed and understood that said estimate must be completed and agreed upon in thirty days from the date of this option, except as aforesaid, in case of high water or sickness, in which said event the time is to be extended thirty days longer, and in no event shall said option be extended longer than sixty days, and, in case of high water or sickness as aforesaid, said timber must be paid for within sixty days.
“It is expressly agreed and understood that, after said timber has been estimated and agreed upon and same paid for at the price aforesaid, ($3.00 per thousand), the said Stoneman-Zearing Lumber Company is to execute and deliver to the said H. S. Matthewman, general manager of the Clarendon Last Block Works, a timber deed to all of the persimmon timber standing upon the above described lands, and is to give him the right, authority and license for ten years from date of said deed to go upon, over and across any of said lands with wagons and teams in the getting of said timber out.
“It is further expressly agreed and understood that should the said Stoneman-Zearing Lumber Company and H. S. Matthewman, as general manager, etc., as aforesaid, fail to agree upon an estimate of said timber, or, after agreeing to same, *578should the said H. S. Matthewman, as general manager as aforesaid, or any one for him or said Clarendon Last Block Works, fail to pay for said persimmon timber at the price of $3 per thousand feet on said estimate, then the said $100 paid as aforesaid shall forfeit to the said Stoneman-Zearing Lumber Company, and belong to and become theirs, but should the said H. S. Matthewman, as general manager as aforesaid, pay for said timber as herein provided, the $100 as aforesaid is to be and become a part of the purchase money therefor.”
Appellee was operating in that territory under the name of Clarendon Last Block Works, having a mill at Clarendon, Arkansas, for the manufacture of shoe lasts, golf heads and shuttle blocks. On October 17, 1906, appellee, by letter, asked for an extension of the option until January 1,1907, and this was granted. Appellee’s manager, Mr. Matthewman, in making the request for extension, pleaded bad weather and high water as having prevented making an estimate of the timber. Nothing further was done under the contract — no estimate of the timber was made by either party — and on December 31, 1906, appellee’s manager tendered to the Stoneman-Zearing Lumber Company the sum of $4,400 to cover the price of the timber (after deducting the sum of $100 paid at the time of executing the contract), according to an estimate of 1,500,000 feet of timber said to have been made by an agent of Stoneman-Zearing Lumber Company prior to the time that the option contract was entered into. The agent’s name is Nimmo, and the evidence tends to show that he made an estimate of the timber for his employer, the Stoneman-Zearing Lumber Company, in July or August, 1906, when the land was purchased by the latter, that he negotiated the sale of the timber to appellee and represented to appellee, during the negotiations, that there were 1,500,000 feet of persimmon timber on the land, and offered to let appellee take the timber on that estimate. That was on the day the option contract was entered into. Appellee declined to purchase the timber on that estimate, and the parties thereupon entered into the written contract hereinbefore set forth.
There is a sharp and irreconcilable conflict in the testimony as to whether Nimmo ever made an estimate of the timber, or whether he had any authority to offer the timber for sale on that *579basis; but the conclusion which we 'reach makes it unnecessary to settle the conflict and determine where the preponderance of the testimony lies. We conclude that appellee has failed toestablish any right to have the contract carried out, even if we accept as correct its own version of the facts. It is not claimed that appellee, at any time during the life of the contract, performed, or offered to perform, it by havi'ng'the estimate of the timber made, or that it was prevented , by the Stoneman-Zearing Lumber Company from taking steps- to estimate the timber'. It is not claimed that the terms of the written contract were changed in any way after its execution, or that Nimmo, or any other agent of the Stoneman-Zearing' Lumber Company, agreed, after the execution of the contract, that appellee might take the timber upon the estimate previously, made. Appellee, on the contrary, bases its claim entirely on the ground that Nimmo represented to its manager, in the. negotiations leading up to the execution of the written contract, that he had estimated the timber at a millón and a half feet and offered to let appellee have it on that estimate, then or any other time within the life of the contract. The writing itself must be accepted as the sole evidence of the agreement between the parties. No effort is made to reform it; and, if'that be attempted, the testimony is wholly insufficient to accomplish such end. The parties reduced their agreement to writing, and by that alone are their rights to be tested. It is an inflexible rule of evidence that all antecedent proposals and negotiations become merged in a written contract, which can not be váried by parol testimony. This is elemental. Appellee declined to accept the alleged offer of sale of the timber on the basis of a million and a half feet, and elected to enter into a written contract for an option to purchase on an estimate thereafter to be made in a certain way. The effect of the written contract was to withdraw the alleged offer of sale on the basis named and to substitute therefor an offer to sell on the basis of another estimate, and appellee acquired by the contract merely the right to accept the offer within the time specified, as it wás not a contract of sale but only an option to purchase. Bonanza Mining & Smelter Co. v. Ware, 78 Ark. 306. If appellee intended to preserve its right to accept the estimate of Nimmo, it should have caused that to be inserted in the written instrument which became the *580sole evidence of the agreement. After having failed to do so, it is barred by well-settled rules of evidence from seeking now to engraft the provision upon the written contract. It is a mistake to assume that the provision in the contract for an estimate of the timber to be made in a certain way was exclusively for the benefit of appellee. To thus construe would be to read something into it which is not found there. When appellee rejected the alleged offer of Nimmo to let the timber go at his estimate of a million and a half feet, then the Stoneman-Zearing Lumber Company elected to prescribe other terms in the written contract upon which it was willing to sell the timber. Those terms were prescribed for the benefit of both parties to the contract, and it is easy to see why each party wanted a thorough and careful estimate made of the timber, so that its true value according to the price named in the contract could be ascertained. The timber estimate made by Nimmo at the time of the purchase of the land, was, confessedly, only a rough and inexact one. The owner may have been willing, when the offer of sale of the timber was first made, to sell on the Nimmo estimate; but, as that offer was not accepted, it is reasonable to suppose that a more careful estimate was desired. At any rate, the written contract so provides, and we are not at liberty to disregard the plain terms of the contract, for to do so would be to make a contract between the parties which they did not make for themselves. If, after the execution of the contract, the Stoneman-Zearing Lumber Company had offered to let the timber go under the contract at the original Nimmo estimate, and there had been a timely acceptance of that offer, it would have operated as a new contract, superseding the old one, and the making of another estimate in accordance with the terms of the contract would have been waived. . But such is not the case. It is not claimed that any such offer was made after the execution of the contract, and there is not a scintilla of evidence that Nimmo had any authority to change the contract, even if he had attempted to do so, after its execution, by offering to let appellee have the timber upon the old estimate. The contract being one merely for an option to buy, the specified time for performance was of its essence; and, before appellee can claim the right to enforce it, it must show performance on its part, or an offer to perform the contract within the time *581specified; otherwise its rights therein ceased. Indiana & Arkansas Lumber Co. v. Pharr, 82 Ark. 573.
As the conclusion which we have .thus reached is decisive of the right to enforce the contract, other phases of the case need not be discussed. The decree is therefore reversed, and the cause is remanded with directions to dismiss the complaint for want of equity.