Opinion by
Mr. Chief Justice Eakin.1, 2. The contract by its terms is an option. For the consideration of $2,000 paid, plaintiff granted to defendants, until April 15, 1909, the exclusive and irrevocable privilege to purchase the land. It was unilateral until accepted by defendants on that day. Until then they were in no way obligated to buy, and it was not a contract of sale. Plaintiff was bound by his offer, during the time specified, that he was not at liberty to withdraw it; there being a consideration paid for it. It is true the $2,000 was to constitute a part of the purchase price, if the sale was completed, but that sum was plaintiff’s money in either case. But, to have the option culminate in a contract of sale, defendants must have accepted it within the time specified, and the acceptance was to be evidenced by the payment of the $18,000 on April 15, 1909. House v. Jackson, 24 Or. 89 (32 Pac. 1027); Clarno v. Grayson, 30 Or. 111: 120 (46 Pac. 426); Friendly v. Elwert, 57 Or. 599 (112 Pac. 1085). Until that should be done, defendants would acquire no right in the property, except that if they entered into possession they would not be tres*173passers while they complied with the conditions of the agreement. Their right to possession was no more than a contingent license.
3. As to the effect of a subsequent parol modification of an agreement of the sale of real estate, the rule is that an agreement, required by the statute of frauds to be in writing, cannot be subsequently changed or modified as to the time of performance by any oral executory contract. There is a full discussion of this question in Neppach v. Ore. & Calif. R. Co., 46 Or. 374 (80 Pac. 482), and in the note to that case in 7 Am. & Eng. Ann. Cas. 1041, from which the conclusion is irresistible that such a subsequent parol modification is void. To hold otherwise would be to open the door to the very frauds the statute of frauds was intended to prevent. However, there is an exception to that rule to the effect that equity will not permit the statute of frauds to be used to perpetrate a fraud, namely: If there was a subsequent oral agreement for an extension of time of payment, acted upon by the vendee, equity will not permit the vendor thus to induce the vendee to make a default in payment as provided by the written agreement, and then invoke the statute. This was the point upon which the case of Neppach v. Oregon & Cal. R. Co. was decided. Mr. Justice Bean in that case, says that by the settled doctrine in England “that an agreement, required by the statute of frauds to be in writing, cannot be subsequently changed or modified as to the time of performance, or in any other respect, by an oral executory contract. * * In this country * * probably a majority (of states) deny the validity of such an agreement, unless acted upon by the parties, and hold that a part of a contract, required by the statute to be in writing, cannot rest in parol. And proceeds to hold that the case before the court was within the exception named, viz., a subsequent extension therein had been orally agreed upon at the request of and for the benefit of the vendor, *174although the vendees were ready to pay within the time mentioned in the written contract. In the note to that case, referred to, many cases are cited, supporting the conclusion of Mr. Justice Bean, where it is said:
“Evidence of an oral agreement altering the terms of a written contract within the statute of frauds, while not evidence of an enforceable agreement, is admissible to establish a waiver of the terms of the written contract, where it appears that the contract, as altered, has been acted upon by the party offering the evidence.”
Other cases arrive at the same result, but place it on the ground of an equitable estoppel, that he who causes anything to be done, or prevents it from being done, shall not avail himself of the performance or nonperformance which he himself has occasioned. Others hold that the statute of frauds may not be invoked to perpetrate a fraud. This is upon the theory that it would be a fraud upon the vendee—he having been induced to let the time of payment go by, by oral promise of extension of the time —to permit the statute of frauds thereafter to be invoked. But, where the situation of the parties is not altered in reliance upon a subsequent oral agreement, such agreement is within the statute, and must be in writing.
4. Applying this rule to the facts in this case, the time of the option was until April 15th, when, if the $18,000 was not paid, “then this agreement shall thereupon become at once null and void, and the party of the first part shall retain to his own use and benefit the said sum of $2,000, and until the payment of said sum of $18,000 this contract shall constitute an option only to purchase on the part of the party of the second part. And after the said sum of $18,000 has been paid, the party of the second part hereby covenants and agrees to purchase said real property upon the terms and conditions above mentioned.” By the evidence of plaintiff, Greenough had a talk with plaintiff on April 14th, at which time Greenough *175was notified that the $18,000 must be paid on the 15th, or the option would lapse; that on the 15th Kressly, by the direction of Greenough, reported to plaintiff that they could not meet the terms of the contract, and that they would forfeit the $2,000 and drop the matter. Upon these facts there is no controversy. Later, on the 15th, Connell, representing only himself, saw plaintiff, and asked for an exclusive option to sell until the following Monday, which plaintiff refused, but told him if he could find a buyer to bring him around, and he would talk it over. Connell testified to the same conversation, and said that plaintiff told him the deal had fallen through, but that he would give him another chance; that plaintiff made one or two propositions for a new deal, which he told him he was not in a condition to consider at that time, and would see him in a few days. Thus it is plain that the option expired by its own terms on the 15th of April, and there was not at any time an agreement to sell between plaintiff and defendants.
There was considerable testimony introduced as to subsequent attempts to renew or reinstate the option on new conditions, but it does not convince us that there was any new agreement made, but if made it was not in writing, and therefore void under the statute of frauds.
The matter urged by the defendants, to the effect that plaintiff was not able to perform his part of the contract, and therefore could not forfeit the agreement of sale, is based upon the theory that the agreement was an executory contract of sale. But it was not such, and could only have been made such by the payment of $18,000 on the 15th of April.
5. As to the suggestion that plaintiff could not give a title, it is admitted that defendants had an abstract of title on the day of signing the option, from which they had notice that plaintiff had only a bond for a deed. At least, it could not have shown more than this, and an *176abstract showing the fee simple title in the plaintiff was not due by the terms of the option until the time the deed was to be executed to the defendants, which was January 15, 1910.
6. As to the possession, the contract provided that the defendants “may enter into and have possession of the above-described premises upon the execution of this agreement and retain possession thereof so long as he complies with the conditions above mentioned.” It does not appear that defendant entered upon the possession thereunder, other than that one of the defendants unloaded some tools upon the premises at one point. The right of possession by defendants, if they had taken it, was but a mere license until they performed the terms of the contract, and on April 15th, when they gave plaintiff notice that they could not make the first payment, they ended their relation to the property and surrendered their possession, if they had any.
7. The possession of its grade and track across the premises by the United Kailway is not involved here. It is not pleaded, and it is not such a possession as can defeat plaintiff’s remedy to quiet title against defendants, and does not defeat- the jurisdiction of the court in this case. If it was a trespasser on the land, or has some right under the plaintiff, the decree in this case does not affect it, and its possession was only a small fraction of the premises involved here. In a suit to quiet title, the requirement of the statute (section 516) that the premises shall not be in the actual possession of another is that, if defendant is in possession, plaintiff has a remedy at law by ejectment, and that action would determine defendant’s right. If, however, that remedy is inadequate to grant the relief desired, equity will entertain jurisdiction, even if plaintiff is not in possession. State ex rel. v. Warner Valley Stock Co., 56 Or. 283: 300 (106 Pac. 780: 108 Pac. 861), 17 Ency. Pl. & Pr. 309:311. In Alton Marine Fire Insurance Co. v. Buckmaster, 13 Ill. 201: 205, it is stated that:
*177“The reason why the party out of possession cannot maintain such a bill is that he may bring an action at law, to test his title, which ordinarily a party in possession cannot do. Such a bill is only entertained by a court of equity because the party is not in a position to force the holder of, or one claiming to defend under, the adverse title into a court of law to contest its validity; and this, as a general rule, is a test to which a court of equity will look to determine whether the necessity of the case requires its interference.”
And this statement of the reason for the rule is quoted with approval in Comstock v. Henneberry, 66 Ill. 214, and Apperson & Co. v. Ford, 23 Ark. 746, 757. Any possession the United Railways may have, whether by way of an easement or wrongfully, cannot be determined in an ejectment action against defendants, nor can ejectment against the United Railways 'determine the rights of the defendants, and therefore the plaintiff has no legal remedy against the defendants, and equity has jurisdiction in this form of suit.
The judgment and decree of the lower court is affirmed.
Affirmed.