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The regimental War Diaries are held at The UK National Archives and as of April 2020 have been made available for free download*. They are the official unit war diaries for the British Army that contain records of daily activities, including casualties. They are not personal diaries.
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Captain Chas Eric Robertson
Royal Flying Corps, Commanding 11th Sqdn.
Date of death: 12/07/1917 (aged 28)
Cemetery: VIS-EN-ARTOIS BRITISH CEMETERY, HAUCOURT
Son of Norman and Lilla M. Robertson, of Walkerton, Ontario.
Lieutenant John Keith Grant Robertson
Royal Flying Corps
Date of death: 01/01/1917 (aged 21)
Cemetery: HEILLY STATION CEMETERY, MERICOURT-L'ABBE
Son of John Herbert Robertson, I.C.S., and Helen Rowena Robertson, of 8, Vincent Square Mansions, Westminster, London.