« Reply #3 on: Monday 18 January 16 10:08 GMT (UK) »
Have you got a copy of the death certificate. That should give you an age at death so you can work out likely year of birth. You could also be lucky and have a family member as informant. He should be somewhere on the 1841 census. The death cert should also give you his occupation, which should help narrow down the right James Campbell in 1841.
Berks / Oxon: Eltham, Annetts, Wiltshire (surname not county), Hawkins, Pembroke, Partridge
Dorset / Hants: Derham, Stride, Purkiss, Sibley
Yorkshire: Pottage, Carr, Blackburn, Depledge
Sussex: Goodyer, Christopher, Trevatt
Lanark: Scott (soldier went to Jersey CI)
Jersey: Fowler, Huelin, Scott