[Halftones from photographs in History of the Underground Railroad in Chester and the neighboring counties of Pennsylvania]

Smedley, Robert C. (Robert Clemens), 1832-1883. History of the Underground Railroad in Chester and the neighboring counties of Pennsylvania · 1883

"...4 are half-tones from photographs...Below each half-tone is: 'Ives' Process, Pat'd Feb. 8, 1881, Crosscup & West, Phila.,' [which predates Pagoda Shadows (1884), long thought to be] the first book published with Ives half-tones..."--Hanson Collection catalog, p. 76