- Keir B. Sterling
Cassin, John (06 September 1813–10 January 1869), ornithologist and printing company executive, was born near the present site of Media, Pennsylvania, the son of Thomas Cassin, a Quaker farmer, and Rachel Sharpless. Cassin attended a Quaker School in Westtown, Pennsylvania, and studied under private tutors. His interest in natural history developed as the result of the emphasis placed on the subject by Quaker schools at that time; this proved decisive in Cassin’s choice of avocation. He began observing and identifying birds on the family property in his mid-teens, and as an adult he regretted that he had not gotten out into the field more often to go birdwatching. At age twenty-one he went to Philadelphia, where he worked first in merchandising and then at the U.S. Customs House. When J. T. Bowen, an engraver and lithographer, died, Cassin assumed the management of Bowen’s firm and continued to supply illustrations for various scientific books and periodicals and for federal government publications....