These documents cover the years 1872-1929. Included is a patent assignment relating to Edison's district and alarm telegraph. Also included are letters from Edison to Albert B. Chandler and Thomas B. Doolittle, friends from his days as an itinerant telegrapher. The remaining documents pertain primarily to the operation of the West Orange laboratory and the phonograph record business during the early 1920s. There are several memoranda to Edison from B. Wolnitzky, chiefly concerning record sales and distribution, and about ten items (mostly undated) from Edison to his engineering assistants, primarily Sam Moore. In addition to manufacturing-related issues, topics include the treatment of female janitorial staff during the cutbacks of 1921, the use of space within Edison buildings, and Edison's interest in reading patents (obtained through attorney William A. Hardy) registered by others in fields in which he was working. Other correspondents include laboratory associate William N. Archer, attorney George Norris, and former New York governor William Sulzer, who was impeached and removed from office in 1913. Courtesy of the Gallery of History, Inc.