Pioneer Photographers from the Mississippi to the Continental DivideThis biographical dictionary of some 3,000 photographers (and workers in related trades), active in a vast area of North America before 1866, is based on extensive research and enhanced by some 240 illustrations, most of which are published here for the first time. The territory covered extends from central Canada through Mexico and includes the United States from the Mississippi River west to, but not including, the Rocky Mountain states. Together,