Thank you vbain and dollylee for your responses.

I have the photo of a gravestone giving both of their names, Scott and Margaret.
The death registration for Margaret seems to be written up weirdly, in that she is listed as Mrs Scott Aitkin instead of Margaret Aitkin, which caused the LDS transcript to be Scott Aitkin.
I do not know her parentage, or rather have not investigated it. Scott's mother was a Jamieson in the Shetlands, so it is quite likely there were other Jamieson families around. I shall take a look at the Bayanne site to investigate further into the Jamieson's.
Dollylee, your mentioning Margaret's immigration as 1868, made me take another look at the 1901 census record and I had missed that previously. For some reason I had her being born in Windermere, Ontario. Ooops and thanks.
Speaking of 1901 Canadian Census, it mentions Scott as being born in 1823. He was in fact born in 1824 according to the Papil, Burra, Shetland baptismal record.
It just struck me, now that I know she immigrated, I wonder if they were married in the Shetlands and she didn't come over to Canada until he settled down from his sea faring ways. Seems that happened in the late 1850's. Hmmmm
