According to his attestation papers dated January 19, 1916 at Kingston, Wilfred L. Stock, Mimico Beach, was born on May 1, 1897 at Mimico, Ontario. He listed his mother Mrs. Mary Stock, Mimico Beach, as his next of kin. He was a clerk by profession and had no previous military experience. He as 18 years and 7 months of age and stood 5 feet 8 1/2 inches tall. He had blue eyes, brown hair and a medium complexion. He was Roman Catholic.
According to the 1914 Toronto City directory he listed his occupation as "action mkr" living with his mother (widow of Edward) on the west side of Victor Avenue, Mimico.