Hi Colin, I realise this is an old post and I have been in contact with you before via Ancestry where you were kind enough to help me out with some information on the family. I have, in my tree, Janet McPherson Cuthel 1863-86. Her daughter, Lily, was boarded/adopted with my Montgomery relatives in Paisley. John Bonnar and Mary Montgomery have Lily listed as their daughter on 1891 census living at 3 Carriagehill, Paisley and in 1901 at 18 Neilston Road in Paisley. Lily's children are John Bonnar Cathell b 1904, Jessie Kerr Bonnar b1906, Thomas Brady b1911 and Andrew Brady b1913. [My own line is the Gordon, Donnelly line and on the 1911 census members of the Bonnar, Cathell, Brady, Ross, Donnelly and Gordon family are all somewhat related and residing 51 Neilston Road]. Lily died in Paisley in 1933, her last known residence 22 Alice street in Paisley. Being only peripherally connected to my own family, I haven't researched all her children but at least one of the males, John, carried the Cathell surname. I wonder if you have researched the Bonnar or Brady line for other descendants? Good luck with the search. I reside still in Paisley, Renfrewshire, and happy to help with local information if I can.