As soon as her complement of men was completed and her bounty paid she sailed to join Admiral Edward Thornbrough's squadron off Goree.

The East Indiamen they were escorting were Northampton, Lord Melville, Earl Spencer, Princess Mary, Anna, Ann, Glory, and Essex.

Later she was stationed at the Cape of Good Hope, and returned home in the summer of 1809, escorting a large convoy of East India Company ships that Captain Tait had taken under his protection at St. Helena.

On 30 September, back at Portsmouth, a court martial was convened on board Raisonnable in Sheerness harbour to try Lieutenant John Cheshire of Grampus.

In November 1811 Commodore George Cockburn hoisted his broad pendant on board Grampus, preparatory to proceeding as one of three commissioners (the others were Thomas Sydenham and John Philip Morier) nominated by the Prince Regent to mediate between Spain and her colonies.