One of the founding figures of American parasitology, Henry Baldwin Ward was a professor of zoology at the Universities of Nebraska (1893-1909) and Illinois (1909-1933). The first American to offer a laboratory course in parasitology and the first to offer graduate instruction in the field, Ward's research interests touched on the medical aspects of parasitology, fish parasitology and ichthyology, fresh water biology, and ecology. The Ward Papers include just under 2 linear feet of professional correspondence dating primarily between the period of Ward's graduate education in Germany in the late 1880s until the time of his retirement in 1933, dealing primarily with parasitological and ichthyological research, the exchange of specimens and publications, and the Journal of Parasitology. Some files include retained copies of letters written by Ward to accompany the letters received.