This letterbook covers the period November-December 1889. Most of the correspondence is by Edison and Alfred O. Tate. The letters relate primarily to the manufacture and marketing of the phonograph and talking doll. There are also several items dealing with the technical and commercial development of the Edison-Lalande battery. Other documents pertain to mining and ore milling, mimeograph royalties, and the phonoplex system. Included also are letters to the firm of Dyer & Seely regarding electric light patents and other patent matters and correspondence about Edison exhibits at expositions in the United States and in Europe. The book contains 499 numbered pages and an index. Approximately 30 percent of the book has been selected. Courtesy of Thomas Edison National Historical Park.