According to his attestation papers dated February 21, 1916 at New Toronto, Sidney William Butler of Grand Avenue, Mimico was born on February 19, 1888 in Birmingham, England. He listed his wife, Florence Butler, Grand Avenue, Mimico as his next of kin. He was a carpenter and an active member of the 12th Regiment, York Rangers. He was 28 years old and stood 5 feet 6 inches tall. He had blue eyes, fair hair and complexion. He was Roman Catholic.
In the 1921 Toronto City directory he is listed as a carpenter living on the west side of Grand Avenue, Mimico.