I think that 2 Martha M COOK's have become confused.
Martha May Bateup - Erskine
* born 1877
* died 1962
* father - John Henry Cook 1854-1919
* mother - Ellen Margaret Cook 1860-1945
married 1895 to Alfred Rueben Bateup (as Martha M COOK)
married 1916 to Hector Brechin Erskine (as Martha M COOK)
divorced from Alfred BATEUP in 1919
What evidence is there that they are the same person?