Bonnie Strathyre is in Songs of the North Vol 1. (Harold Boulton wrote the words to that, as well as Skye Boat Song and Loch Tay Boat Song.)
Westering Home is not in either Vol 1 or Vol 2 (both of which I have, and have checked).
Vol 3 was as rare as hen's teeth: never managed to get a copy. Don't know if it's in there....

As for dates: neither of my volumes gives publication dates nor which edition, but notes in the front of Vol 2 say that it was brought out 10 years after the first edition of Vol 1, during which time 12 editions of Vol 1 had been produced.
Some of the arrangements in Vol 2 say Copyright 1895, whereas those in Vol 1 are undated.