According to his attestation papers dated January 12, 1917 at Toronto, John Peer Dewsbury of Frederica Street (present day High Street), Humber Bay was born on July 3, 1898 in Toronto. He listed his mother Adeline Dewsbury, Frederica Street, Humber Bay as his next of kin. He was a labourer, unmarried and an active member of the 10th R.G. for 6 months. He was 18 years and 6 months of age and stood 5 feet 7 1/2 inches tall. He had brown eyes, dark brown hair and a medium complexion. He had scars on his left calf and on the arch of his left foot; a piece off the tip of his second finger of his left hand; and, a mole on the right of his abdomen. He was a member of the Church of Christ.
In the 1921 Toronto city directory he is listed as a shipper living with his father Franklin Dewsbury on the east side of Frederica Street, Humber Bay.