This five-volume undertaking is based on the Chickasaw enrollment cards, sometimes called "census cards," prepared by the Commission to the Five Civilized Tribes (the Dawes Commission) between 1898 and 1914. The Commission's purpose was to rule on citizenship applications submitted by members of the Five Civilized Tribes covering some 250,000 persons. The Commission ultimately enrolled 101,000 people according to the following categories, indicating...