The Yuchi have attracted considerable attention owing to the fact that they were one of the very few small groups in the eastern part of North America having an independent stock language. Their isolation in this respect, added to the absence of a migration legend among them and their own claims, have led to a belief that they were the most ancient inhabitants of the extreme southeastern parts of the present United States. The conclusion was natural, almost inevitable, but the event proves how little the most plausible theory may amount to in the absence of adequate information. Strong evidence has now come to light that these people, far from being aboriginal inhabitants of the country later associated with them, had occupied it within the historic period.
Historical Outline of the Five Civilized Tribes
The Creek, Uchean and Seminole in Indian Territory
in 1904 and 1905 Frank G. Speck received first hand accounts from the Yuchi Indians in Oklahoma concerning their culture, customs, history and religious practices. After performing due diligence and comparing what he was told with previously published and unpublished material on the Yuchi Indians he published his Ethnology of the Yuchi Indians. If researching the Yuchi Indians, then this is the premiere source of material for you.