I believe Elizabeth Hamilton Afflack and her husband were buried in/near Bozeman, Montana.
The Gallatin County Genealogical Society has an index and she has a possible obit in the Bozeman Advent Courier published 25 Feb 1899, page 3, c3.
William Afflack is published in same newspaper 16 Dec 1899, page 3, c3
I have never gotten the obits...
Anyway, hope you find them!