I have from the Board of Trade, Agreements, crew lists and muster rolls of British merchant vessels, compiled at English sea ports, BT 98/540 details of the voyages of the vessel Earl Gower in the half-years ended June 1836, December 1836 and June 1837. James Cormack is listed as age 32, born Wick and is master of the ship, having joined the ship in February 1833.
My ancestor, John Banks, was mate during the period March 1833 to 27 February 1837, the last trace I have of him.