_Note to the Reprint Edition_
In the twenty years since the original publication of this book, studies
of peyotism have continued to appear, until there are at present over one
thousand bibliographic items on the ethnography of peyotism and related
subjects. The author has summarized recent studies in an extended review
of “Twenty Years of Peyote Studies,” which is in press for appearance in
an early issue of _Current Anthropology_. Readers interested in following
two decades of developments in peyotism may wish to be referred to this
publication.