1821 but died five years later.) Naiad sailed for a cruise off the coast of Spain on 24 September. On 27 November, while Naiad was off Brest, Thomas saw some small vessels open musket fire on boats belonging to and wound two seamen. Naiad captured Gun-boats Nos. 361 and 369. Each mounted one long brass 4-pounder and one short 12-pounder and had on board a lieutenant from the 63rd Infantry Regiment, 36 privates and six seamen. They had sailed with fourteen others from Dandiorne to Brest. Thomas sent the gunboats back to Britain under the escort of . Naiad returned to Plymouth on 7 January 1805 from a cruise off the coast of Spain. She brought with her a large Spanish ship with 200,000 dollars on board plus a valuable cargo of dry goods. This was Nuestra Senora de los Dolores, which Naiad had captured five days earlier. Naiad sailed again on 8 January on a cruise to the westward. She sent in a neutral ship flying Papenburg colours, suspected of carrying Spanish property. On 15 February Naiad was in sight when Hazard captured the Dutch schooner Der Vriede. Next, Naiad capture Mars on 25 June. Naiad was in company with on 9 July 1805 when they captured the brig Argo and the sloop Nelly. Then on 10 September Naiad detained the American ship Wells, of eleven men and 205 tons (bm). Wells was sailing from Salem to Marseilles with a cargo of sugar and coffee. Trafalgar Circa 1 October, the arrival of the frigates Naiad, , , , and off Cadiz allowed Nelson to detach them to disrupt local shipping supplying provisions for the joint fleet in Cadiz. By 10 October Naiad was engaged in the tactical preparations etc. for the forthcoming battle. On 20 October the combined fleet departed Cadiz. During the Battle of Trafalgar on 21 October, Naiad was too small to take part in the battle itself. Instead, she lay to windward of the action. After the battle she destroyed the grounded Monarca and towed to Gibraltar. In September 1806 Parliament voted a grant of £300,000 to the participants in the battle, with the crew of Naiad being among the beneficiaries. In 1847, the Admiralty issued the NGSM with clasp "Trafalgar" to all surviving claimants from the battle. 1806–1808 Naiad was in company with and the gun-brigs and when they captured the ship William Little, John