I now have further information regarding this Yuill family-
Ann Buchanan Yuill dob. 27/1/1850, married William Muir (master watchmaker) in Glasgow 26/10/1874. They had daughter, Mary E. 1878
Isabella Ferguson Yuill dob 2/1/1860, married Reverand Alexander Gray (of Craig Free Church in Dunscore)in Blythsood Glasgow 15/8/1887. They had three children- Alexander Ross 1888, Mary 1891, and Anne Isabela ferguson 1895.