The Union Medical Association was officially established at Blackstone Village, Mendon, Massachusetts, on May 12, 1834 by local doctors Hiram Allen, Abel Wilder, Metcalf Marsh, Ariel Ballou and Moses D. Southwick. The goal of the Union Medical Association was to maintain and advance the medical knowledge of its members. This collection includes reports and transcripts of lectures on interesting medical cases, new remedies, medical ethics, and statistics created from 1834 to 1858 by the Association’s members. Also included in this collection are autograph letters of different French, English, and American physicians dated 1758 - 1836. Currently, the papers of the Union Medical Association are the part of the Worcester District Medical Society collection housed at the Worcester Historical Museum.