He returned to England in August 1818 .
In October 1816 Duff was appointed to command of the 10 - gun brig - sloop HMS Beaver and sent to the Caribbean , where he assumed command of the 18 - gun HMS Rifleman in September 1817 .
Duff returned to England in August 1818 .
In October 1816 Duff was appointed to command of the 10 - gun brig - sloop HMS Beaver and sent to the Caribbean , where he assumed command of the 18 - gun HMS Rifleman in September 1817 .