In 1805, Clarendon began a voyage as a slave ship in the triangular trade in enslaved people but fell prey to Spanish privateers after she had embarked captives.

[2] Captain William Grice acquired a letter of marque on 7 January 1805.

[3] Spanish records report that in June 1805, Viceroy Sobremonte, of Argentina, issued two letters of marque, one for Dolores (24 guns), Currand, master, and Berro y Errasquin, owner, and one for Dromedario (20 guns), Hippolito Mordel, master, and Canuerso y Masini, owner.

In three months of cruising Dolores captured three ships and one brig, carrying a total 600 enslaved people.

Dromedario captured five ships, carrying a total of 500 enslaved people.