Hermann R. Muelder was a distinguished historian and recognized authority on the Midwest. He graduated from Knox College in 1927 and from the University of Wisconsin with a Ph.D. in 1933. Muelder taught history at Knox College from 1934 until 1974. From 1956 - 1967 he also served as Dean of the College and acting president from 1973 to 1974. He retired from teaching in 1974 and was named college historian and honorary trustee. He remained all his life an affectionate student of Knox College history and advocate for the college.
Fighters for Freedom: A History of Anti-Slavery Activities of Men and Women Associated with Knox College. Columbia University Press, New York, 1959.
Missionaries and Muckrakers: The First Hundred Years of Knox College. University of Illinois Press, Urbana, 1986.
A Hero Home from the War: Among Black Citizens of Galesburg, Illinois 1860-1880. (pdf) Knox College Library, Galesburg, IL, 1987.
Church History in a Puritan Colony of the Middle West. Central Congregational Church, First Presbyterian Church, Galesburg, IL, 1937.