- Cassin, John
- Illustrations of the Birds of California, Texas, Oregon, British and Russian America. Intended to contain descriptions and figures of all North American birds not given by former American authors. Philadelphia: J.B. Lippincott, -1856
Cassin (1813-1869) headed an engraving and lithographing firm in Philadelphia which produced illustrations for government and scientific publications. He pursued ornithology as an amateur, giving his spare time to the Philadelphia Academy of Science which was developing the largest bird specimen collection then in existence. Cassin arranged and catalogued the 26,000 specimens, and published regular reports of the results of his research. Unlike Audubon, his publications were primarily technical monographs of new species.