Constance Radcliffe has these on her family tree of Kerruish, Ballafayle. She misses Mary and has no husbands for Margaret and Ann. She notes that Margaret was housekeeper at Ballastole in 1861.
Don't go hunting at Ballafayle, though, for the nearest they get to it is that John's first cousin, another John Kerruish, married Mary Fargher, Ballafayle. The Kerruishes of Ballafayle start with that couple.