[Book review] Illustrations of the birds of California, Texas, Oregon, British and Russian America

John Cassin was one of the leading American ornithologists of the 19th century. Appointed Honorary Curator of Birds at the Academy of Natural Sciences of Philadelphia in 1842, he built and studied the collections of that institution (although engaged full time in business) until his death in 1869. This book represents perhaps his most important and least well known endeavor.