Basic Details Surname Petersen Forenames W S Gender Male Information stated on memorial Alternative forename William Sinclair War First World War (1914-1918) Served or died Died Primary Service As stated on memorial Service (Primary - Stated) Army Unit (Primary - Stated) R H A Rank / Title (Primary - Stated) 2nd Lieut Our References Service (Primary - Our reference) British Army Unit (Primary - Our reference) Royal Horse Artillery Rank / Title (Primary - Our reference) Second Lieutenant