She then made two voyages as a slave ship in the triangular trade in enslaved people before a French privateer captured her in 1804.

On 16 August 1802, Captain Beale sailed Duke of Bronte from London on her second voyage transporting enslaved people.

[8] It is not clear where Beale and Duke of Bronte acquired captives, but on 18 July 1803, she delivered 168 to Kingston, Jamaica.

[6] On 3 February 1804, Lloyd's List reported that Duke of Bronti, bound for London, had to put back to Jamaica.

[9] Then on 22 June, Lloyd's List reported that a French privateer had captured Duke of Bronti as she was sailing from Jamaica to London and took her into Santiago de Cuba.