I suspect that my husband's great grandfather DUNCAN MACRAE was a member of the Free Church of Scotland. He was born c1850 , he gives his place of birth on the 1891 census as Petty InvernessShire, and Glenelg in the 1901 census. His parents were Donald/David MacRae and Sarah Macpherson.
I have been unable to trace his birth on SP

and wonder if indeed he was a member of the Free Church his birth record would be somewhere else.
Any help or advice as to where to go from here would be appreciated

.
Frances