On 7 July 1809, Captain Robert Gibson received a Letter of marque for John O'Gaunt.[1] Under his command, and later under the command of James Moon, who received a letter of marque on 23 March 1810,[1] she made several voyages as a West Indiaman. On 1 November 1811, as she was sailing from London to Cork and Barbados, she lost an anchor in The Downs.[2]
On 27 November 1813 John O'Gaunt, P. Inglis, master, and four other merchant vessels left Portsmouth in a convoy under escort by . The other four were:
Due to a heavy storm, the five merchantmen lost contact with the convoy and its escort. On 6 December Clorinde captured all five merchant vessels, in the Atlantic Ocean (44.5°N -40°W). The French took off the crews of four vessels and scuttled three. In their haste, they failed to sink Blenden Hall properly, leaving her floating. They kept Lusitania as a cartel and put all their captives aboard her. They then permitted Lusitania to sail to a British port. She arrived at Plymouth on 18 December.[3]
John O'Gaunts entry in the Register of Shipping for 1814 carries the notation "CAPTURED".[4]
