http://www.lewis-clark.org/article/899It starts with being told by Indians before they started their trip about this gigantic bear they would see as they went west.
"The Indians give a very formidable account of the strength and ferocity of this anamal, which they never dare to attack but in parties of six, eight or ten persons; and are even then frequently defeated with the loss of one or more of their party. "
Several harrowing encounters where the party would shoot repeatedly at a grizzly and just barely escape with their lives, in some cases diving into a river from an overhang to get away from it.
Towards the end:
"I find that the curiossity of our party is pretty well satisfied with rispect to this anamal, the formidable appearance of the male bear killed on the 5th added to the difficulty with which they die when even shot through the vital parts..."