Hi William
Yes, Thomas and Catherine lost 3 daughters in Dunfermline between 1869 and 1873 in Dunfermline. Thomas was the informant at daughter Margaret's death in 1873. Remaining daughter, Helen, emigrated to USA in 1874. His son, William, remained in Dunfermline until he died in 1908.
Joseph Spowart, who married Sarah Beveridge, was another of Catherine's brothers.
I rechecked the 1841 Census entry for Christian Hunter and I was wrong in my belief that she was listed as McLean. No relationship was mentioned - she could have been a niece.
Dod