James Mooney — American Scientist born on December 30, 1861,

James Mooney was an American ethnographer who lived for several years among the Cherokee. He did major studies of Southeastern Indians, as well as those on the Great Plains. His most notable works were his ethnographic studies of the Ghost Dance after Sitting Bull's death in 1890, a widespread 19th-century religious movement among various Native American culture groups, and the Cherokee: The Sacred Formulas of the Cherokees, and Myths of the Cherokee, all published by the US Bureau of American Ethnology. Artifacts from Mooney are in the collections of the Department of Anthropology, National Museum of Natural History, Smithsonian Institution and the Department of Anthropology, Field Museum of Natural History. Papers and photographs from Mooney are in the collections of the National Anthropological Archives, Department of Anthropology, Smithsonian Institution... (wikipedia)

When all is ready, the leaders walk out to the dance place.
Among the southern tribes, on the contrary, hats were sometimes worn in the dance, although this was not considered in strict accordance with the doctrine.
The dance commonly begins about the middle of the afternoon or later, after sundown. When it begins in the afternoon, there is always an intermission of an hour or two for supper. The preliminary painting and dressing is usually the work of about two hours.
At intervals between the songs, more especially after the trances have begun, the dancers unclasp hands and sit down to smoke or talk for a few minutes.
Facing inward, join hands so as to form a small circle. Then, without moving from their places they sing the opening song, according to previous agreement, in a soft undertone.