William Jasper was born in 1898 to Thomas and Alice Jasper at Treguddick Cottage, South Petherwin.
He joined the Royal Navy as a Stoker 2nd Class and served on HMS Dido and HMS Tornado (Service No. K/39952). HMS Dido served in home waters during WW 1 – 1914 as a Depot ship 3rd Submarine Flotilla, then later that same year as a Depot ship 3rd Destroyer Flotilla Harwich, 1915 – Depot ship 9th Destroyer Flotilla Harwich & 1918 -Depot ship 10th Destroyer Flotilla Harwich and as such never saw action. William joined HMS Dido on 30th October, 1917, and for an unknown period of time he was transferred to HMS Tornado. Due to being taken ill, he left that ship on 17th December, 1917 to return to HMS Vivid on 18th December, 1917, from where he was transferred to the Royal Navy Hospital at Chatham on 9th January 1918, where he died of pulmonary tuberculosis on 6th March 1918. (HMS Tornado was sunk by mines on the 23rd December 1917 off the Dutch coast just 6 days after William’s transfer).
He is buried in St. Paternus Churchyard, South Petherwin.