Hello Edward, Just working my way through the names listed in FMP. My hunch says it's Captain Gwilym Henry Storks Prance, born in Solva Penbrokeshire 1895, died Marine Club Calcutta Geraldton 1946 due to misadventure whilst master of the Ocean Gypsy. Dis A No: 748824. The records of his ships showing on FMP are incomplete [missing page?] checking out the 25 trees on Ancestry and their records. The Stanhope was known as the Lancer in 1937 and changed name the following year.
Lancer/Stanbrook also known as Polyfloisvos and used by 'Republicans during the Spanish Civil War.'
https://www.uboat.net/allies/merchants/ship/103.html. Only 10% of crew lists survive for this period.:(
Still searching for the correct Captain Prance.