Basic Details Surname Tenison Forenames J Gender Male Information stated on memorial Alternative forename Julian War First World War (1914-1918) Served or died Died Notes All service and death details are sourced from The Old Birkonian Society website (see References) which also carries a picture and a biographical details of him. Primary Service Our References Service (Primary - Our reference) Royal Navy Unit (Primary - Our reference) Submarine Service Rank / Title (Primary - Our reference) Lieutenant Commander Death and Burial details Year of death 1916 Month of death August Day of death 15 Age at death 31 Manner of death as stated Unknown Manner of death reference Killed in Action