According to his attestation papers dated January 14, 1916 at Toronto, Walter Harlock, Mimico, Ontario was born on July 2, 1893 in Toronto. He listed his mother Mary Harlock, Mimico as his next of kin. He was a plumber and had 1 year and 2 months experience as a Private in the 36th Peel Regiment. He was 22 years and 6 months of age and stood 5 feet 7 inches tall. He had blue eyes, dark hair and a fair complexion. He had a mole on his lower chest and a scar on the third and forth fingers of his right hand. He was a Methodist.
In the 1921 Toronto City directory he is listed as a clerk living on the west side of Queens Avenue, Mimico.
According to the 1911 census he was the son of Jim (James?) and Mary Harlock.
His brothers Norman and Albert also enlisted.