Cornwall entered Lloyd's Register in 1794 with Johnston, master, J. Marylees, owner, and trade London–Jamaica.

[1] Lloyd's Register for 1797 showed Cornwall's master changing from M. Johnston to T. Blyth, and her trade from London–Jamaica to London-South Seas.

At Cabo Blanco, Peru,[8] she and another whaler, Kingston, assisted by Sally, captured Nostra Senora de Bethlehem, which had been sailing from Callao to Guayaquil.

[2] Lloyd's List reported that Cornwall had been in company with Resolution, Irish, master, and William.

[2] Homeward bound, she left St Helena on 10 September 1804 in company with Lady Castlereagh and the whaler Ocean.

In between, Captain James Shand had acquired one on 3 May 1810, indicating that either he had been briefly, or had intend to be Cornwall's master.

[16] On 1 January 1818 there was a fog as Cornwall, Jordan, master, was returning to London from Isle of France.

[5] Captain William Richardson, Cornwall's master, reported that at Bahrain the main topic of conversation was the expected British attack on the pirates in the Gulf.

[19] In late 1819 the government appointed Captain Francis Augustus Collier of HMS Liverpool to command the naval portion of a joint navy-army punitive expedition against the Joasmi (Al Qasimi) pirates at Ras al-Khaimah in the Persian Gulf.

The naval force consisted of HMS Liverpool, Eden, Curlew, several EIC cruisers including HCS Aurora, and a number of gun and mortar boats.

On 31 December Cornwall, James Richardson, master and Tulsee Munchajee, owner, sailed to Dwarka.

She then carried General Lionel Smith and to embark elements of the 65th Regiment of Foot to Coogeram on the Arabian coast.

[22] The capture and destruction of the fortifications and ships at Ras al-Khaimah was a massive blow for the pirates in the Persian Gulf region.

[24] An 1824 listing of vessels belonging to Bombay showed Cornwall with Richardson, master, and Tulsee Monackjee owner.