She was 34 days out of Guadeloupe and had taken one prize, the Scottish ship Mercury, which was carrying a cargo of lumber and provisions to Demerara via New York.

Unique formed part of Commodore Samuel Hood's squadron at the capture of Surinam River in 1804.

The squadron consisted of Hood's flagship Centaur, Pandour, Serapis, Alligator, Hippomenes, Drake, and transports carrying 2000 troops under Brigadier-General Sir Charles Green.

Testimony before the Vice admiralty court in Antigua revealed that Delaware had been the British slave ship Ranger, which a French privateer had captured circa May 1805 and taken into Guadeloupe.

[8] One mention of the action reports that the French vessel had twice the armament of Unique, and that the British schooner sank with her colours still flying.