His Majesty's hired armed cutter John Bull served the British Royal Navy under contract between 5 May 1804 and 26 November 1806.

[6] While on the Jamaica station, and prior to 1 June, John Bull, under the command of Lieutenant Kortwright, captured the French schooner Elizabeth, which was carrying a cargo of sundries.

[8] On 8 March 1806 John Bull, under the command of Lieutenant George Broad, captured the Spanish vessels Legero and Los Animos.

[2] In mid-January 1807 the privateers John Bull and Busy detained Vrow Anna, a Dane, which had been sailing from Marennes to Gothenburg.

[12] In early February John Bull detained the American vessel Henrietta, Nichols, master, which had been sailing from Leghorn.

[14] The privateers John Bull and Indefatigable sent the Danish ship Little Catherine, Beorne, master, into Plymouth on 24 June.

[15] On 24 July John Bull sent into Dartmouth the Danish vessel Aurora, Pedersen, master, which had been sailing from Lisbon to Antwerp.

[17] At the end of August John Bull detained Froe Secolitas, Sursen, master, which had come from Saint Thomas's.

[23] In September the French privateer Pourvoyeur, of Dieppe, captured the cutter John Bull and carried her into that port.

[26][b] On his 20-day cruise, Balidar, captain of Pourvoyeur, gathered four prizes, including John Bull, that he sold in Dieppe.