I found a few more things that I hope may help. I still haven't found a birth record for John Angus but his parents were Angus Gillis and Isabella McFarlane. So far I haven't been able to find death records for his parents but his father, Angus, died sometime between 1891 and 1901, and his mother, Isabella, died between 1871 and 1881. Angus, Isabella and their children were all born in and around Margaree.
Here is the family in the 1871 census:http://search.ancestry.com/cgi-bin/sse.dll?indiv=try&db=...
This is John Angus, Ellen and Ellen's son James in the 1911 census which was taken a few months after they married. Whoever transcribed it had their surname as Gallie, which I corrected:http://search.ancestry.com/cgi-bin/sse.dll?indiv=try&db=...
I'm attaching the death record of John Angus's sister Catherine. I'm also attaching what I believe is the death record of his brother Hugh. It gives his mother's name as Elizabeth McFarlane which the person who recorded the record could have heard instead of Isabel.
I found another tree with a notation that Angus Gillis and Isabella McFarlane were married 13 February 1838 at St Michael Catholic Church in Margaree. They had no documentation and the tree contained no other information about either of them and didn't include their children. It might be an idea to contact St Michael's to see if they have any records of the family or might know where to find them.
Margaree Family of Catholic Churches
1181 East Margaree Road,
East Margaree, NS
I'll post again if I find anything else.