Source: Mentioned in War Diary April 1917
Earned the Military Cross: London Gazette. No. 30188.
Major C.C. Gwyn, on of the most popular and efficient of Officers was killed by a M.G. bullet, about 100 yards from the objective and Lieut. W.J. McLean was also killed while leading his men across “No-man’s-land”. After the death of Major Gwyn, Lieut. P. Jerdan[i] assumed Command of “B” Company, and did splendid work in consolidation and reorganization, as also did Lieut. D.A.G. Parsons who Commanded “A” Company.
18th Battalion War Diary. April 9, 1917.
Lt. Porteous, Can. Infy.
For conspicuous gallantry and devotion to duty. He assumed command of the company, and led them with great coolness and initiative. He single-handed bombed a rifle grenade battery which was holding up one of the platoons, and forced them to surrender.
War Diary of the 18th Battalion CEF 
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