While traveling down the course of the Canadian, we sometimes found the buffalo very abundant. On one occasion, two or three hunters, who were a little in advance of the caravan, perceiving a herd quietly grazing in an open glade, they 'crawled upon' them after the manner of the 'still hunters.' Their first shot having brought down a fine fat cow, they slipped up behind her, and, resting their guns over her body, shot two or three others, without occasioning any serious disturbance or surprise to their companions; for, extraordinary as it may appear, if the buffalo neither see nor smell the hunter, they will pay but little attention to the crack of guns, or to the mortality which is being dealt among them.
Commerce of the Prairies (1831–1839), Chapter 24 Preparations for returning Home — Returning to the Wild Deserts