In the years since Finley v Yuba Co, the CA Supreme Court weighed in, providing certain findings contrary to 2 of the items contained in Warren's quoting of Finley. Namely, agreements must be proven, not implied and ignorance of the true boundary does not equate to uncertainty.Warren Smith wrote:Finley v. Yuba County, 99 Cal.App.3d 691 (1979)
"....."
The 2nd Appellate District pointed out the CA Supreme Court's findings, in its decision for Martin v Van Bergen, 209 Cal.App.4th 84 (2012).
"Proof of the acquiescence in the existence of a fence without evidence of an agreement to take the fence as a boundary is not sufficient to establish an agreed boundary."
"There is no evidence why the previous fence had been built in that location. It is true the neighboring property owners have long acquiesced in the location of the fence. But Bryant makes clear that such acquiescence is not sufficient to prove an agreed boundary. There must be evidence of an actual agreement."
", if Kirkegaard's conclusion that mutual mistake is sufficient to show "uncertainty" was ever good law, it is no longer. Bryant requires "deference to the sanctity of true and accurate legal descriptions". "Thus a boundary is not uncertain if it can be ascertained by an accurate survey."
For giggles and going back to the direction of the original post, some might wonder why none of the surveyors in Martin v Van Bergen utilized the fence as best evidence of the original quarter corner.