Hi Trish and Monica
Thanks for all the help. With your encouragement I've now found the death of James's father (Charles McInnes) and looked at the result of the search. Result - the name of his wife is confirmed, I now know the names of his father and his mother (+ maiden name) and I also know Charles's father's occupation. I'll now go on IGI and see what else I can find. I've also found other members of the family thanks to reading how to optimise a search on Scotlandspeople and not use too many credits at once!
regards, Fairlane