Rhexenor had been sunk by U 217, commanded by Kptlt. Kurt Reichenbach-Klinke.
She had been commissioned in January 1941 and in her career of almost two and a
half years she sank three ships, totalling 10,651 tons.
The Fourth Mate, Graham Allen, was landed in Brest as a prisoner of war on February 23rd. He 'celebrated' his 21st birthday and survived a depth charge attack during the passage on the uboat.
On 5th June 1943, in 30-18 N 42-50 W, U217 was sunk by depth charges dropped from Avenger aircraft of the US escort carrier USS "Bogue". All 50 hands were lost.
From the U-boat.net website. Click the link to go there.
The Fourth Mate going ashore to captivity.
Click on shipsnostalgia for more on his trip.