You are looking at an important image of a Cheyenne Animal Dance. It was taken in 1927 by Edward S Curtis. The picture shows Cheyenne people gathered along the waterfront, some dipping hands in water, some carrying umbrellas.
Here for your consideration is an old picture of an Oraibi Snake Dance. It was created in 1904 by Edward S. The photograph presents Hopi Indians in Arizona, in snake ceremony, with pueblo and onlookers in the background.