Basic Details Surname Mathias Forenames John 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) Royal Navy Unit (Primary - Stated) R N R H M S "Laurentic" Rank / Title (Primary - Stated) Commander Our References Service (Primary - Our reference) Royal Navy Unit (Primary - Our reference) HMS Laurentic Rank / Title (Primary - Our reference) Commander