This folder contains copies of outgoing correspondence similar to the material found in the Letterbook Series. Most of the letters cover the period June-December 1892 and pertain to electric lighting, the kinetograph, ore milling, the phonograph, and other technical and business interests. Included are numerous letters regarding Edison's exhibit at the World's Columbian Exposition in Chicago. Also included are personal letters to family members and items relating to visits and interviews with Edison. Most of the correspondence is by Edison's private secretary, Alfred O. Tate. Unsigned letters have been attributed to Edison, Tate, or Thomas Maguire (Tate's secretary), depending on their content.

Approximately 30 percent of the documents have been selected. The following categories of documents have not been selected: routine personal and business correspondence regarding employment applications, financial transactions, interviews with Edison, mining properties, patents, and stock transfers; routine letters from the West Orange laboratory relating to accounts, bills, shipping, and orders for equipment and supplies; Tate's personal correspondence; letters of transmittal and acknowledgement; duplicate copies of items selected in the Letterbook Series.