How does Jim Fergus use imagery in One Thousand White Women?

Examples of Imagery:

The sun had risen, and the camp was going about its business, but it was muffled quiet and safe inside the tipi, the gentle morning sunlight filtering softly through the buffalo skins; the fire was warm and took the early-morning chill off the air, the tent pungent with the mingled scents of human beings and smoke and coffee and meat cooking, the smell of animal hides and earth. All these no longer seemed to me to make for an offensive odor, but rather an oddly comforting one — the smells of home.

The Reverend looked at me, the blood beginning to rise in his round pink hairless face, darkening his complexion.

I caught one glimpse of Phemie, mounted on a white soldier's horse, completely naked, black as death against the whiteness of snow, galloping down upon a soldier who was afoot and trying to extract his bayonet, which was lodged in the breastbone of one of our women. Phemie carried a lance and gave a bloodcurdling shriek that seemed not human and when the soldier looked up at her his eyes widened in terror as she bore down upon him.