Basic Details Surname Henderson Forenames Colin M H. Gender Male Information stated on memorial War Military Service Served or died Died Primary Service As stated on memorial Unit (Primary - Stated) ROYAL NAVY Sub-unit (Primary - Stated) Not stated on memorial Rank / Title (Primary - Stated) Lieut. (E) Our References Service (Primary - Our reference) Royal Navy Unit (Primary - Our reference) The Honourable Artillery Company Rank / Title (Primary - Our reference) Lieutenant (E) Death and Burial details Country of death Wales Town of death At Sea Country of burial Wales Town of burial Holyhead Cemetery Mynwent Maeshyfryd Cemetery Year of death 1939 Month of death September Day of death 3 Age at death 25 Manner of death as stated HMS THETIS sank on 1st June 1939 during trials with the loss of all 99 on board.