Two passages from "Hunting the Hard Way." The second passage turned my direction of searching for the answer of Hill's grizzly toward Roy Glasgow some time back. I have yet to acquire anything of significance, but I have a feeling there is something there. Maybe someone will discover a manuscript or collection of old letters or photographs or ..............?
“I have killed grizzly bear, mountain lion[cougar], Jaguar, and many wild boar with the bow and arrow, and I cannot wholly agree with all the claims made for the tusker. The grizzly is faster, tougher, stronger, and bigger than the boar, and to my way of thinking is by far the most dangerous animal on the North American continent.” HTHW pg. 211
“While Ned was still out with his party of dudes, I went elk hunting with Roy Glasgow, a fellow I had met in Cody. Roy was an interesting person and a fine hunter. His specialty was bears. Ned said that Roy was one of the finest bear hunters in the Rockies. Later, I was with him when he had a chance to prove his prowess on grizzly bears, and he came through wonderfully. This time, however, we were after elk.” HTHW pg. 35. This may be the key to Hill’s grizzly claim.