Plaintiff sued in Ohio to set aside a deed of Ohio land given by the plaintiff, a resident of that state, in exchange for Texas lands deeded by the defendant who was also a resident of Ohio, for mistake as to defendant's title to the Texas land resulting from a Texas statute of which both parties were ignorant at the time of the transaction. Held, a mistake of foreign law is a mistake of fact authorizing equitable relief. Miller v. Bieghler, 123 Ohio St. 227, 174 N.E. 774 (1931).