Basic Details Surname Johnstone Forenames Wm R Gender Male Information stated on memorial War First World War (1914-1918) Served or died Served Primary Service As stated on memorial Unit (Primary - Stated) 2/4th The Black Watch Rank / Title (Primary - Stated) Sergeant Instructor Our References Service (Primary - Our reference) British Army Unit (Primary - Our reference) The Black Watch (Royal Highlanders) Rank / Title (Primary - Our reference) Sergeant Instructor