Wadsworth, W. H. Speech of Hon. W. H. Wadsworth, at Flemingsburg, Kentucky, June 13, 1868. Washington, D.C.: Union Republican Congressional Committee, 1868

Series 4 comprises publications documenting state and national matters and includes works on government, history, agriculture, events, and state politics. Many resources focus on the states of Kentucky and Michigan. Of special note, the final work in this series is a program from the April 9, 1968 memorial services for Dr. Martin Luther King, Jr. held in Atlanta, Georgia. Each subseries (Kentucky, Michigan, Other States) is arranged by publication date, then by author and title. Within the same year, works without authors precede works with authors.