Thomas Condon (1822-1907) was an Irish Congregational minister, a geologist and paleontologist who was appointed University of Oregon's first professor of geology in 1876 and continued as professor and chair of Natural Sciences until 1907. The collection (1897-1906) contains lecture notes, writings by Condon on a new fossil Pinniped, and books on skeletons and Pinnipeds owned by Condon.