A Spanish vessel captured her at the Galapagos Islands in 1801 on her second whaling voyage.

[3] She entered Lloyd's Register in 1798 with W. Shaw, master, W. Boyd, owner, and trade Portsmouth-Jamaica.

[1] In 1799 Mortlock replaced Shaw as master, and her trade was listed as Portsmouth-Cape of Good Hope.

Britannia called in at Rio de Janeiro in July for sugarcane syrup.

[6] Loss: In May 1801 Lloyd's List reported that a Spanish ship of 24 guns had captured "Britannia, late Mortlock, of London", and Castor & Pollux, Anderson, master, in the Galapagos Islands.