Describe how Lame Deer's great-grandfather was killed by mistake.

The first white man that Lame Deer ever met was very hairy and couldn't ride a horse very well according to Lame Deer. He had eyes of a blue-green color, two .45 Colt guns on his hips, and was chewing tobacco while smoking a cigar. The man spoke in English and tried to trade money for Lame Deer's grandmother's moccasins.