In between, she made four voyages for the British East India Company (EIC), carried assisted immigrants from England to Sydney, and transported convicts to Tasmania.

1st EIC voyage (1812): Captain George Henderson sailed from Calcutta on 12 May 1812, bound for Great Britain.

[1] In September Cornwall, Dorsetshire, Scaleby Castle, Batavia, and Lord Eldon were at 14°8′N 28°11′W / 14.133°N 28.183°W / 14.133; -28.183 on their way from Saint Helena to England and under escort by HMS Loire.

British ships were then free to sail to India or the Indian Ocean under a license from the EIC.

[9] This meant that she could trade between the Indies and Great Britain and France, even when not under charter to the EIC, so long as she acquired a license for each non-EIC voyage.

2nd EIC voyage (1816–1817): Captain James (or Jeremiah) R.J.Toussaint sailed from the Downs on 23 January 1816, bound for St Helena and China.

3rd EIC voyage (1819–1820): Captain John Peter Wilson sailed from Portsmouth on 22 April 1819, bound for China.

[1] On 23 February 1820, when she was two days south of Scilly, Cornwall encountered Prince Regent; one of the vessels provided the other with provisions.

[1] 4th EIC voyage (1826–1827): Captain William Younghusband sailed from Torbay 25 July 1826, bound for Bengal.

[13] Later in May Cornwall was in Portsmouth, being surveyed with a view to purchase, to carry 1200 tons of "electric wire tubing" 180 miles across the Mediterranean.