hi lass, if there is any truth in him being a coachman then this is him on the 1851 census in glasgow.
1851 census;
124 Green Street, Glasgow
James...head...age 32...coachman
elizabeth...wife...age 31
john...son...age 4
elizabeth...dau...age 2
George...visitor...age 20...coachman
robert...visitor...age 18...coachman
james, george, and robert all born in the leith area
Joe