HMS Hermes was a 20-gun Hermes-class sixth-rate flush-decked sloop-of-war built in Milford Dockyard to the lines of the ex-French Bonne Citoyenne.

[2] On 24 September 1811, while near Cape La Hève (Le Havre), Hermes recaptured the Prussian brig Anna Maria which had been bound for London from Lisbon.

[3][4] As the day continued, strong winds drove Hermes off station when near Beachy Head Browne discovered a large French lugger operating as a privateer in the midst of a number of English vessels.

[8] Four days later, Hermes and Belle Poule captured the American letter of marque schooner Gipsy (or Gipsey).

She was on her way from New York City to Bordeaux with a cargo worth £50,000 when the British vessels captured her in the mid-Atlantic after a three-day chase.

[10] On 27 December Elephant and Hermes captured the American privateer schooner Sword Fish of Gloucester, John Evans, Master, and her crew of 82 men.

[15] ) On 18 January 1815, Percy faced a court martial on board Cydnus, off Cat Island on the coast of Mississippi.

The court acquitted him of all blame, finding that the circumstances justified the attack and that all involved had behaved with great gallantry.