The following Descriptive Catalogue is intended to systematize the collection of Photographic Portraits of Indians now in the possession of the United States Geological Survey of the Territories, and to place on record all the information, we have been able to obtain of the various individuals and scenes represented. It is of course far from complete; but it is a beginning, and every new fact that comes to light will be added to what has already been secured. This information has been gathered from many sources, principally from Indian delegates visiting Washington, and by correspondence with agents and others living in the Indian country.