have the lot surveyed so I can establish my boundary line.’ I did not discuss the problem of the garage with the Alffs. * I never had any conversation with Mr. Alff about building my garage that I can remember. I do not remember making any statement to him about the possible survey to establish a boundary.”
The weight of the evidence regarding plaintiff’s asking for a survey of the disputed line so he would know where to locate his garage seems to be with defendants. It is apparent the testimony for them on this point is quite inconsistent with the claim the fence has been acquiesced in for the statutory period by the adjoining owners as the boundary between them. It seems doubtful plaintiff himself so regarded the fence a short time before this action was commenced July 7, 1958. See as somewhat in point Petrus v. Chicago, R. I. & P. R. Co., supra, 245 Iowa 222, 227, 61 N.W.2d 439, 441.
Y. As stated, plaintiff also claims defendants are estopped to claim any interest in property west of the fence.
The theory of estoppel plaintiff invokes is that “where one has invaded the right of another, thinking he is within his own right, and that invasion is known to the other, and the other stands by and sees him make valuable improvements upon the invaded territory, under the supposition that it is a part of the possessions of the invader, equity will thereafter deny to the invaded the right to object to the invasion, * ® Herrick v. Moore, 185 Iowa 828, 832, 833, 169 N.W. 741, 742; Hart v. Worthington, 238 Iowa 1205, 1220, 30 N.W.2d 306, 314; Trimpl v. Meyer, supra, 246 Iowa 1245, 1251, 71 N.W.2d 437, 440. See also Schauland v. Schmaltz, supra, 252 Iowa 426, 431, 107 N.W.2d 68, 71.
The doctrine of estoppel in cases of this kind comes near the rule of adverse possession although one may be estopped before the ten years essential to adverse possession expire. Citations last above; Minear v. Keith Furnace Co., 213 Iowa 663, 669, 239 N.W. 584, 586.
Trimpl v. Meyer, supra, quotes this with approval from 11 C. J. S., Boundaries, section 75, page 649: “Where no permanent or substantial improvements have been made, the doctrine