After becoming acquainted with the Blackfeet Indians, I realised that there were locked up in the breasts of the old chiefs and medicine men rich treasures of folk-lore, religious beliefs and ceremonials. I saw that the younger generation was indifferent to their tribal customs, traditions and religion. I also observed that they had no written language, and it seemed inevitable that, with the passing of the old chiefs and medicine men, their ancient religion and folk-lore would fall into oblivion. When I discovered that I could obtain the unbosoming of their secrets and that the door was open to me for study and investigation, I resolved that I would do my best to preserve all the knowledge available. Having kept accurate records of my experiences and investigations, I have been encouraged to believe that information has been secured worthy of publication. This book has accordingly been published with the hope that its narrative of experiences among the Blackfeet would interest the general reader, and its records of investigation would be of some value to the science of ethnology. The narrative form has been chosen in the belief that this method would furnish a more faithful portraiture of the environment, family life and personal character of this tribe of Indians, and would enable the reader to form a better conception of their religion.