The Ralph Stone papers, Series II contain research index cards, copies of primary & secondary materials, dealing with the Pana-Virden mine riot and Illinois labor and national labor movements including radical and communist groups, cooperatives, and John H. Walker and Dunca McDonald, who were both linked to the labor movements in Illinois. A minor portion of the file is devoted to subjects of personal interest to Mr. Stone. These subjects include various individuals, race relations in Springfield IL., the Macoupin County Courthouse, and the selection and use of audio-visual equipment.