The book "Study of Suyuan cults. The Eleventh Annual Report of the Bureau of Ethnology to the Secretary of the Smithsonian Institution, 1889-1890, Government Printing Office, Washington, 1861, pages 351-544" is the result of James Owen Dorsey's research into the Suiyuan cultures. In this work, the author describes in detail the religious practices, rites, beliefs and mythology of the Suyuans, revealing important aspects of their spiritual life. Dorsey invites the reader to delve into the world of traditions and rituals of these Native American tribes, revealing the uniqueness of their culture and way of perceiving the world. This book is a valuable resource for those interested in the ethnology and religion of North American tribes.