Basic Details Surname Jeffreys Forenames R Gender Male Information stated on memorial War First World War (1914-1918) Served or died Died Primary Service As stated on memorial Service (Primary - Stated) Navy (RN) Unit (Primary - Stated) HMS Clan MacNaughton Rank / Title (Primary - Stated) Commander Our References Service (Primary - Our reference) Royal Navy Unit (Primary - Our reference) HMS Clan McNaughton Rank / Title (Primary - Our reference) Commander Death and Burial details Country of death Not Stated on Memorial Town of death North Atlantic Country of burial Not Stated on Memorial Cemetery Not Stated on Memorial Year of death 1915 Month of death February Manner of death as stated Lost at sea (with all hands) on patrol duty Manner of death reference Other Personal Details Occupation Not Stated on Memorial