A great-great uncle William Murray (another one!) born Airdrie in 1848 married Mary McKinnon born in Balfron Stirlingshire in 1852. Marriage cert from ScotlandsPeople - married on 8 August, 1873 in Govan. Also from ScPe. a birth certificate for Janet Turnbull Murray on 5 May 1874 in Barony. My problem is that in Census for 81, 91 and 1901 (and the correct family I believe) the eldest is Martha born either 73 or 74. I cannot find a matching birth record for her - nor can I find Janet Turnbull Murray in the Census. Janet Turnbull was William's mother and Martha was the name of Mary McKinnon's grandmother and younger sister. What am I missing??