She made two voyages as an "extra" ship for the British East India Company (EIC).
Lady Forbes, of 58 tons (bm), was a sloop launched at Leith in 1808.
[2] Castle Forbes was a merchant ship built by Robert Gibbon & Sons at Aberdeen, Scotland in 1818.
She sustained damage in 1826 on a voyage to India and was condemned at the Cape of Good Hope.
Katherine Stewart Forbes was built by William & Henry Pitcher at Northfleet dockyard in Kent, England in 1818.
She also carried early settlers to South Australia in 1837, and New Zealand in 1841 and 1851, and mapped part of the coast of Borneo.
Charles Forbes, of 917 tons (bm), was launched by J. Thomas on 19 June 1821 in Calcutta.
The ship ran aground on the Pyramid Shoals, in the Strait of Malacca and was wrecked on 2 May 1851.
Forbes, of 161 tons (bm), was a teak-built steam vessel, built at the Howrah Dock Co, Sulkea (opposite Calcutta), and launched in 1829.
She made voyages to China and the Red Sea until in 1837 the Calcutta Steam Tug Association purchased her to tow vessels on the Hooghly River.
Matheson lost his bet, but Jamesina was still the first opium vessel to arrive at Canton that year.