The Yankton of South Dakota by 1916 had a peyote cult strong enough to warrant the sending to Congress of a petition to pass an anti-peyote bill signed with ninety-two names. The Yuchi affiliated with the Creek around Sapulpa and Kellyville, received peyote from the Cheyenne. Shonle cites three additional groups we have not yet included. These are the Shoshoni, who received peyote in 1919, the Sioux (1909-10) and the Crow (1912). Comparisons of the present list with Shonle’s gives on the whole earlier dates, yet this need not be considered in any sense a discrepancy. Shonle’s data were based on government sources, and should stand as indicating the dates when the various cults became virile enough to attract official notice. Our own data, based on native sources, give on the other hand what are probably the earliest contacts and introductions of the rite, without reference to the number or percentage of adherents in any tribe. It is evident from them too that tentative starts and multiple origins are the rule rather than the exception, and Shonle’s information and our own should be regarded as supplementary rather than contradictory.[74] Although peyotism is gone or decadent among the Tarahumari and the Mescalero, it is still vigorously spreading in the United States and southern Canada. Conceivably it could spread until it embraced all Plains, Basin and Woodlands groups whose earlier culture is sufficiently consonant with its concepts, and it may have some slender chance of spreading in the southern and eastern Pueblos and Plateau, but scarcely elsewhere, for both geographical and cultural reasons. The cult may be expected to spread for some time in the future, but when its inevitable decadence and probable ultimate disappearance will have been accomplished, we may have witnessed in it the last of the great intertribal religious movements of the American Indian. The present section sums up the external history of the diffusion of peyotism so far as it can be known from our Mexican sources, and in the Plains, where it appears that the pre-peyote mescal bean cult prepared the way somewhat for the use of the narcotic cactus. The Plains rites are basically derived from the Kiowa, Comanche and Caddo peyote ceremonies, which in turn derive from the Mescalero Apache (whence the diffusion traces back to the Lipan and Tonkawa through the Carrizo perhaps to Tamaulipecan groups). The Kiowa and the Comanche led in the diffusion of the standard aboriginal ceremony, but the Caddo variant was powerfully influenced by the individual, John Wilson, and diffused to the Osage, Quapaw, Delaware and others in a somewhat modified form. This is the subject of a special appendix.