Abstract The Powell Society was incorporated in 1969 in order to promote the general study of the canyons of the American West, the study of the Colorado River Basin, and the study of John Wesley Powell and his work, and also to facilitate the publication of materials generated by these studies. These are their official records, as collected by Dr. Henry W. Toll during his time as president of the society (1969-2008). Materials cover all aspects of the society's activity, whether administrative,...