Crow Eagle; Piegan. In ancient times of traditional customs and laws; they were based on customs; especially in their social relations; and these constraints were largely part of their religion. A custom worthy of attention is the intensive use of the pipe. When they lit it; they made it touch earth and put it to heaven in a silent prayer to the spirits. Every significant act of their day was preceded by this rite. Photo taken from volume 6 of the encyclopedia published by Edward S. Curtis (1868-1952) on the Indians of North America; with a foreword by Theodore Roosevelt. Between 1907 and 1930; 20 volumes were published.