The s.s. Madryn built and completed by January 1916 at the yard of Osbourne Graham & Company, North Hylton, Sunderland. The company commenced operations in 1871. The vessel was 290.0 ft. long x 43.5 ft. breath x 19.3 ft. depth. She was a single screw vessel of 2,244 gross and 1,328 net register tons, and managed by the Mervyn Steam Shipping Company Limited, otherwise Martyn, Martyn & Company Limited of Newport.

She was en route as a defensively-armed, requisitioned auxiliary vessel, departing Penarth for Devonport with a cargo of coal, when she was torpedoed and sunk by U-82 on the 16th September 1918, five miles off Trevose Head, Cornwall. [818]