These essays were originally published by the University of California Publications in American Archeology and Ethnology. During a residence in the Pomo region the existing vestiges of some of these Pomo ceremonies were observed whenever possible. Some information was obtained from informants of three Pomo dialects, Northern, Central and Eastern. In Ceremonies, Mr. Barrett presents information relative to the ceremonial organization, ghost or devil ceremony, Guksu ceremony, dances and the Messiah Cult. Bear Doctors is a dissertation surrounding one of the most concrete and persistent convictions of the Indians of a large part of California in the belief of the existence of persons of magic power able to turn themselves into grizzly bears.