Harry E. Nelson was born on September 21, 1913, in Rockford, Illinois. He attended Rockford High School, then was admitted to Augustana College. He graduated in 1935 with a bachelor’s degree. He also earned a master’s from the University of Wisconsin-Madison in 1940, and a doctorate from the University of Iowa in Iowa City in 1950. Nelson taught high school and college math in several Midwestern states until 1946, when he became a faculty member at Augustana College. He taught in the mathematics department until his retirement in 1988. In 1972, he sponsored a three-day seminar at Augustana on space exploration that featured Neil Armstrong. He also helped to establish the John Deere Planetarium and Gamble Observatory in 1969, and served as its director until 1988. Nelson was involved in many clubs and societies, especially related to Augustana College, astronomy, and mathematics. He passed away on February 7, 2004. This collection contains personal and professional correspondence, photographs, lecture notes, newspaper clippings, and ephemera, mostly from Nelson’s time on the Augustana faculty.