Hi,
I didn't know what that said, its clear now , not known. John and Mary or Janet where both deceased by 1877, so the informant on the death which was his son in 1908, would not likely have known the occupation of his grandfather that he never met.
Thanks for that, i'm opting for Cambell too, was kinda hoping it might have been something else, no birth record matching cambell or campbell.
Thanks again everyone