Some smart matches for here son suggested that her name is Elizabeth Boyle
Elizabeth Boyle is not likely to be her name, see here>
This Elizabeth Downie nee Boyle
https://www.findagrave.com/memorial/261249114/elizabeth-downie
was married to a different Alexander Downie
https://www.findagrave.com/memorial/261249118/alexander_downie
who died it Sotland in 1875
Confirmed here
https://falkirklocalhistory.club/wp-content/uploads/2021/05/erskine...
