530t/659t, 3 mast ship rig, B.1818 Howrah, 117'x31'11"x5'9" tween decks, Duncan Dunbar, London.
(Engaged as a convict transport 1828-1831).
The Somerset Years - Government Assisted Emigrants ...states that the Bussorah Merchant was built entirely from teak at Calcutta in 1818.
"An older vessel than most on the emigrant run, she had carried the first group of government-assisted emigrants to Sydney in 1833.
The ship had undergone repairs several times over the years.
She was felted and doubled in '33, had repairs to topsides and decks in '46, and was sheathed with yellow metal in '49..."
The BUSSORAH MERCHANT departed from London via Plymouth with Captain Edwards, arrived Port Adelaide on November 10th, 1848
"Migrant Ships for South Australia 1836-1860" by Ronald Parsons, details an account of a journey in 1850.