Wow, you have both been busy, I will need to take some time to read back through your messages.
Sarah is a bit of a mystery. I didn't know of her existance until recently. Her parents died when the children were quite young. I had been following the travels of two of her brothers from County Antrim to America just after the turn of the century and finally tracked down living descendants of them in America last year. It was then that mention of Sarah came about. Because I had so much research on the brothers, the family assumed I would have known of Sarah too and so when they started talking about Sarah in Canada I was at a loss. She certainly did exist, but no one can remember what her surname may have been and only refer to her by her birth surname. I have found a possible match for her on the 1901 Scottish Census and thought she may have gone to Canada from there. Certainly she visited her family in America on occasions as they have old photos in which she is present, as well as the 1910 postcard from Winnipeg.
We might never track down Sarah, but I love a challenge and who knows....maybe one day.
Off to read your various posts...thanks again for all your interest.