I am currently building my family tree, and I have noticed that you have been searching for details of your grandfather.
Major William Clark Angus, was the brother of my Grandfather Thomas Cuthbertson Angus.
There was around 6 boys and 3 girls and one brother John Angus with his wife violet were in Vancouver.
If this is anything like the stories you have heard please get in touch
I am currently in Penticton, searching through the Archives