As a guide in the Rockies, Ralph O. Edwards took pride in the establishment of Yoho National Park and provided his reminiscences in a memoir, with a chapter about cayuses ("Indian" horses):
Trail to the Charmed Land (Victoria and Saskatoon: Herbert R. Larson Publishing, 1950).
[BCBW 2004] "1900-1950" "Outdoors"
Trail to the Charmed Land (Victoria and Saskatoon: Herbert R. Larson Publishing, 1950).
[BCBW 2004] "1900-1950" "Outdoors"