In June–July 1804
Mediator underwent fitting by Brent, of Rotherhithe. Then she underwent further fitting between July and October, but at
Deptford Dockyard. Her measurements, and hence burthen, increased. Captain Thomas Livingstone commissioned
Mediator in August 1804 for the North Sea. Captain John Seater replaced Livingstone in January 1805, and on 25 February sailed towards the East Indies. Equally, on 17 February,
Mediator escorted a convoy of Indiamen out of Portsmouth. She escorted them as far as
St Helena and then returned to Britain in September. On 3 March 1806,
Mediator and left Cork, escorting a convoy for the West Indies. The convoy was reported "all well" on 25 March at . In May 1806
Mediator was on the
Jamaica Station. Seater died about that time, and Captain William Wise replaced him. On 14 November, Wise and
Mediator captured
West Indian. On 14 February 1807 Captain
Wise and
Mediator fell in with
Bacchante, Commander
James Dacres, in the
Mona Passage. Dacres also had the French schooner
Dauphin, which he had just captured.
Mediator and
Bacchante were patrolling, looking for French warships and privateers, so Dacres took
Mediator under his command and hatched a plan to raid the port of
Samana, "that nest of privateers". Dacres had
Dauphin come into the harbour there under her French flag, with
Bacchante disguised as her prize, and
Mediator, a former merchantman, appearing to be a neutral ship. This stratagem permitted the British vessels to come into the harbour and anchor within a half a mile of the fort before the enemy realized that vessels were British warships. After a four-hour exchange of fire with a fort there, manned primarily by men from the privateers in the harbour, the fort fell to a land attack by the seamen and marines from
Bacchante and
Mediator, the landing party being under Wise's command. The British captured two French schooners undergoing fitting as privateers, and an American ship and a British schooner, both prizes to French privateers. Before they left on 21 February, the British destroyed the fort and its guns. In the attack, Dacres had four men wounded. Wise had two men killed and 12 wounded as
Mediator had been more heavily engaged than
Bacchante in the exchange of fire with the fort. Dacres estimated that French casualties had been high, but did not have a number as the Frenchmen took to the woods as the fort fell. The
Lloyd's Patriotic Fund, subsequently awarded both Dacres and Wise a sword each worth £100 that bore the inscriptions: • "From the Patriotic Fund at Lloyd's to James Richard Dacres Esqr. Capt. of H.M.S. Bacchante for his Gallant Conduct in the Capture of the French National Schooner Dauphin and the Destruction of the Fort and Cannon in the Harbour of Samana on 16th February 1807 effected by the Bacchante in company with H.M.S. Mediator as Recorded in
the London Gazette of the 25th of April". • "From the Patriotic Fund at Lloyd's to William Furlong Wise Esq. Capt. of H.M.S. Mediator for his Gallant Conduct in Storming and Destroying with the Seamen and Marines belonging to His Majesty's Ships Bacchante and Mediator the Fort and Cannon in the Harbour of Samana on 16th of February 1807 as Recorded in the London Gazette of the 25th of April". In May
Mediator and Wise captured the
Grouper on 3 May and the
Dispatch on 6 May. In May 1808 Captain
John Pasco managed to obtain the command of
Mediator for three months. In January 1809
Mediator was at
Corunna. The
battle of Corunna, which took place on 16 January 1809, had British troops holding off the French to cover the embarkation of the British Army after its retreat. In this battle
Sir John Moore was killed.
Mediator and a number of other warships and transports arrived on 14 and 15 January from Vigo.
Mediator took on board a great number of sick and wounded soldiers, and then sailed to Lisbon. After the evacuation was complete a violent fever and ague inflicted Blamey so the Navy appointed Captain James Woolridge acting captain until Blamey recovered. ==Fate: A blaze of glory==