Photographer Mark Miller opened his studio in Fort Collins, Colorado, in 1914. The town he chose to live and work in sits in a river valley in northern Colorado, nestled between the Rocky Mountain foothills and the semiarid high plains, with Denver to the south and Cheyenne, Wyoming, to the north. Established as a Civil War-era army post, the town was a Wild West frontier outpost until it was tamed in the 1870s by the arrival of a land-grant college and the railroad. By the turn of the century, Fort Collins had become a quietly respectable college town with a thriving economy and steadily...