Jemsatjee Bomanjee built the Marquis Cornwallis of teak for the Honourable East India Company (EIC) between 1800 and 1801.

[c] In December 1801, she sailed, together with Upton Castle (a country ship), Betsey (an armed HEIC brig), some other vessels, and 1000 troops to Daman and Diu to persuade the Portuguese governor to resist any French incursion.

Marquis Cornwallis, under the command of Captain Isaac Godsalve Richardson,[d] left Bombay on 7 Feb 1803, reaching St Helena on 12 May, and arriving at the Downs on 1 August.

In February 1807, Cornwallis, under the command of Johnston, was ordered on a cruise against Spanish shipping and ports on the west coast of South America.

Cornwallis sailed first to Juan Fernandez, then cruised northward along the coasts of Chile, Peru, Panama, and Mexico, capturing 17 vessels, most of them small, two of which were sent as prizes to Port Jackson.

[12][13] One of them, the re-captured South Sea whaler Atlantic, was found to be too unseaworthy for a Pacific crossing; her captors scuttled her off Punta Mala (Panama) on 7 September.

Montagu then engaged in a number of operations in the Dutch East Indies, attacking forts on islands in the Celebes and Amboyna.

On 17 January, Montagu and Cornwallis attacked a Dutch fort at Boolo Combo in Bouthian Bay in the Celebes.

The British burnt 11 small vessels (20-50 tons each), and the public buildings, took the ammunition, and spiked the eight 9-pounder guns and two brass field pieces there.

In the campaign, Cornwallis captured the ship Mandarine, of 16 guns and 66 men, Captain Besman, on 3 February after a chase of four hours.

[g] On 1 March Cornwallis chased a Dutch man-of-war brig all day until she took refuge in a small bay on the north side of the island of Amblaw.

The wind being light and variable, and night approaching, Montagu sent in Cornwallis's boats, under the command of Lieutenant Henry John Peachey.

After rowing all night, they captured the Dutch brig Margaritta Louisa, under Captain De Ruyter on 2 March.

[15] Cornwallis, Dover, and Samarang in January 1816 shared in the prize money awarded for sundry property captured on and off Ambonya between 19 February 1810 and 21 March.

[i] In late 1810, Cornwallis was deployed with Albemarle Bertie's squadron that forced the surrender of Isle de France.

William Fisher took command in December 1810 after Montagu was selected from among the captains assembled for the invasion and reassigned to lead a naval brigade in support of the British Army forces' ground offensive.

[4] However, in late August she escorted Windham, General Hewett, and Wanstead out of the Channel as they left Britain with convicts for New South Wales.

[4] The court martial of captain, officers and men of Cyane for the loss of their vessel took place on board Akbar at Halifax on 28 June 1815.