He can't have been left it in her will because she died after him.
Confirmation of the testament of Annie Hope Henderson or Duncan or Henderson of Argaty, who died on 17 April 1934 at The Coldoch, Blair Drummond, Perthshire, was granted at Glasgow to Lesley Jane Hope Henderson or Snadden and Maysie Murray Henderson or Bowser.
Lesley J Hope Henderson married William McNair Snadden in Glasgow in 1919.
Maysie Murray Henderson married David Charles Bower in Glasgow in 1922.