Scope and Contents From the Collection: The Joseph Leidy Correspondence Collection contains letters from scholars, scientists and acquaintances to Joseph Leidy with a few letters from Leidy to various correspondents. Many of the correspondents were associated with the natural sciences, medicine and acadamia. The letters discuss travel, field work, research, theories, finances, and personal lives and reflect his wide interest in all phases of natural history, protozoology, embryology, parasitology, paleontology, anthropology,...