Not sure I can help but we are looking into the same family.
1855 was the year that registrations became compulsory in Scotland, before this date it was only recorded in the Parish Records, but it was not required.
After having spent many an hour in the Records Office looking at every entry for all the spellings I am no further back than you.
Duncan and Margaret's children have also been giving me the runaround. 5 confirmed and 3 maybes.
I am from Donald Angus McRae, I would be interested to know which child you are from.
Reply posted by : Stuart Hepburn