. . . "Item 3: I give and devise, unto my beloved wife Mrs. Mary V. Calnan, all of my property and estate of every character, including all personal and real property, choses in action, notes and accounts, which I may own and possess, at the time of my death, during her natural life; or as long as she remains my widow, with the exclusive right, power and authority, to manage and control the same, subject" .