Basic Details Surname Tregarthen Forenames Henry Hollow 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 Unit (Primary - Stated) Royal Naval Air Service Sub-unit (Primary - Stated) HMS President Rank / Title (Primary - Stated) Air Mechanic 1st Class Our References Service (Primary - Our reference) Royal Navy Unit (Primary - Our reference) Royal Naval Air Service Rank / Title (Primary - Our reference) Air Mechanic 1st Class Death and Burial details Year of death 1917 Month of death February Day of death 7 Age at death 41 Manner of death as stated Died of pneumonia