Harry Stephen Quigley MC DCM was born in Toronto and had a younger brother, Francis Granger Quigley DSO MC (2), who also won bravery awards for service in WW1.

Harry Quigley was a surveyor and in Winnipeg, Manitoba, at the time of outbreak of WW 1 in 1914 when he enlisted with the Engineers of the Canadian Expeditionary Force. In April 1915 he was awarded the Distinguished Conduct Medal (DCM).

His citation reads as follows: For conspicuous gallantry and devotion to duty while acting as linesman during the action of 22nd to 27th April 1915, during which time he repaired at least 100 breaks under heavy shell fire. Private Quigley also assisted a wounded officer to a place of safety. He was himself wounded while repairing a line under fire on May 2nd." Shortly after he was awarded a commission as a lieutenant in Signals Company.

In August 1916, Quigley was awarded the Military Cross (MC) for bravery. His citation reads as follows: "For conspicuous gallantry and good work in maintaining communications. On one occasion during an attack he maintained an advanced report centre in spite of intense enemy shelling." He soon transferred to the Royal Flying Corps (RFC) as an observer and later became a pilot with the RFC.

Returning to Canada after the war, Quigley devoted his attention to the development of aviation, and was one of the few who remained with it during its doldrum days. He was connected with the Air Board for a short time and then joined Price Bros. Ltd., as their chief pilot and manager of the air service operated from Chicoutimi, Quebec, by that firm in 1920, 1921 and 1922 carrying out forest surveys and protective work.

In the fall of 1922, Captain Quigley formed the Dominion Aerial Exploration Company, becoming its president and chief pilot. Activities of the Dominion Aerial Exploration Company grew rapidly in 1924 and 1925. During 1925, a flying boat was sent from Roberval to Sept Iles in June making the 400 mile trip in one hop.

During 1926, Quigley formed Canadian Airways Limited which he operated until October 1928, when it was sold to International Airways Limited. Quigley flew the first air mail route from Rimouski, Quebec, to Montreal in an H.S. Flying Boat.

He died in January 1929 in Port of Spain, Trinidad, where he had gone in October 1928 to recuperate from a lengthy illness. His funeral was held in Toronto; the city of his birth.