Peacock was commissioned under Commander William Peake in February 1807 for the North Sea. On 5 September Peacock was in company with the sloop at the capture of Der Fruhllng. A week later Peacock was in company with the 74-gun at the capture of the Danish ship Anna Karina.
In 1812 Peacock transferred to the Jamaica station. There, on 1 August, she captured the American ship Forester.
See main article: Sinking of HMS Peacock. On 24 February 1813 Peacock encountered USS Hornet off the mouth of the Demerara River. After she sailed out of the anchorage where she had left her sister ship she encountered the 20-gun Hornet sailing in. Peacock and Hornet sailed opposite each other and exchanged broadsides at 5:25 pm. Peacock then turned to discharge her other broadside but Hornet got on Peacocks starboard quarter and proceeded to pour fire into her. Hornets fire was accurate, while Peacocks was poor. Within 15 minutes Peake was dead, British casualties were heavy, and Peacock was a wreck. She struck and both vessels anchored. It became clear that Peacock was sinking and the Americans rescued her crew. She had suffered five men killed and 33 men wounded. Three of her wounded later died aboard Hornet. Four of her men, who escaped in a small boat, may also have been lost. Hornet had one man killed and four wounded, one of whom died later.
Peacock sank in five and a half fathoms of water (33abbr=onNaNabbr=on) of the Caroband Bank. In sinking she took nine of her men with her, and three Americans. The wreck was visible for some time thereafter.
Lloyd's List initially reported that Captain Peake of Peacock and eight of her crew were killed in the action, and 27 were wounded; 19 men, who could not be rescued, went down with her when she sank and Hornet rescued the rest. Hornet had lost only one man killed and two wounded. She then arrived at Martha's Vineyard on 19 March.[1]
Three men on Peacocks crew were Americans, one of whom was killed in the action. When it became clear that an engagement was imminent, the Americans asked to be permitted to go below so as not to have to fight against their countrymen. Peake refused the request and the men had to serve the guns. One of the two surviving Americans turned out to be a cousin of the wife of Captain James Lawrence, captain of Hornet. Peacocks captured ensign was on display at Mahan Hall at the U.S. Naval Academy, but was removed on 27 February 2018 for preservation.[2]
Eventually, Peacocks surviving officers and crew were put on a cartel on which they reached Britain in June.
There was a dispute as to whether Espiegle was in sight during the action and had failed to come out and join the action. The Americans said she was, while the British said she was not. If the reported position of the wreck of Peacock is correct, Espiegle was not in sight. In 1814 Commander John Taylor underwent a court martial, the charges including that he had failed to join the engagement. He was acquitted of this charge.