In the summer of 1907 I spent about seven weeks among the Stoney Assiniboine of Morley, Alberta, as part of a Museum expedition to the Northern Plains. Though very much of the ancient life had become completely effaced under the influence of missionary teaching, I was able to collect a reasonably large body of mythological material. On my return from a trip to the Chipewyan in the following year, it was deemed advisable to spend the month of August among the Assiniboine at Ft. Belknap, Montana, in order to enlarge the inadequate conception of Assiniboine ethnology obtained from their Canadian kinsmen. Beyond ascertaining the essential similarity of the folk-lore of the two sections, relatively little attention was given to mythology in 1908, the main object being to secure notes on social and ceremonial organization. To these is prefixed a necessarily brief account of the history and material culture of the tribe, largely reconstructed from the records of older(...)".