[citation needed] During this period, under Captain Pierre Flasse, Thunderer fought at the Battle of Jean-Rabel in which she and HMS Valiant forced the crew of the French frigate Harmonie to scuttle their vessel to prevent her capture.

[2][a] The French force had been out for 60 days and had captured 12 West Indiamen, two of which, Kent and Albion, the British had already recaptured.

The advertisements for the sales gave the origins of the slaves as Martinique,[7] suggesting that Pegasus had been carrying false papers.

On 10 October 1800, Thunderer rescued the crew of HMS Diligence which had struck a reef off the north coast of Cuba.

Venus, of 358 tons (bm), was pierced for 28 cannons but carried 18, sixteen 6-pounder guns and two 8-pounder carronades.

Her captain, William Lechmere, returned to England to attend a court-martial as a witness to the events of Admiral Calder's action off Cape Finisterre at the time of the battle.

[citation needed] On 25 November, Thunderer detained the Ragusan ship Nemesis, of 350 tons (bm), four guns and 18 men, Poulovich, master.

Nemesis was sailing from Isle de France to Leghorn, Italy, with a cargo of spice, indigo dye, and other goods.