I do not know when Jane Mercer died although I believe it is near the turn of the century. When my grandfather was 8, his father James Galway took his family back to Ireland to see Jane who was in ailing health. The story goes that he walked in and although she was blind, she knew from the shape of his head when he hugged her that it was James. That is about it.
I guess "just outside of" was a relative thing. I live in Virginia, so Caledon appears very near to Belfast to me on the maps. I hope to visit in the near future so perhaps I will have a better appreciation for the distances.