French frigate Thétis (1788)

Thétis was a 40-gun Nymphe-class frigate frigate of the French Navy.

From 1790, she served in various diplomatic missions in the Indian Ocean, before returning for a refit in Brest in 1793. From 1795, she was shuttled from France to Guadeloupe. She took part in the Invisible Squadron of Zacharie Allemand, before returning to Martinique along with the 16-gun brig Lynx.

On 17 December 1806, Thétis and the brig Sylphe captured HMS Netley (1798). The French sold Netley and she became the privateer Duquesne. Less than nine months later, on 23 September 1807, HMS Blonde captured Dusquesne. (The Chroniques de la Marine Française report that in 1807, Thétis captured a 18-gun brig name Methly. This may be a slightly garbled reference to the capture on Netley, there being no Royal Navy vessel named Methly.)

HMS Amethyst captured Thétis off Lorient by in the Action of 10 November 1808, and she was brought in British service as HMS Brune. British casualties in the engagement were severe, with 19 killed and 51 wounded, but French losses were several times larger, with 135 dead, including her commander, Capitaine de Vaisseau Jacques Pinsum, and 102 wounded.