This comprehensive, well-documented, biographical dictionary of some 1500 photographers (and workers engaged in photographically related pursuits) active in western North America before 1865 is enriched by some 250 illustrations, many of them previously unpublished. The territory covered stretches from Alaska through Central America, and embraces all of the present-day states of the United States that fall, at least partially, west of the Continental Divide. The work is distinguished by the sheer number of entries, by the engaging quality of the biographical narratives that cover both the professional and personal lives (wherever possible) of the subjects, and by the careful, detailed documentation. It will be an indispensable reference work for historians, libraries, institutions with collections of early western photographs, and many enthusiasts and collectors in the field.