273 N.W. 165 E.C. FOSTER et al., Appellants, v. CLYDE W. FOSTER et al., Appellees. No. 43738.Supreme Court of Iowa. May 4, 1937. DEEDS: Validity — mental incompetency — undue influence — burden of proof. The mental incompetency of a grantor to execute a deed of conveyance, or the obtaining of said conveyance by the […]