This letterbook covers the period July-September 1890. Most of the letters are by Edison and Alfred O. Tate. The correspondence relates primarily to the manufacture and marketing of the phonograph and talking doll. Included are letters pertaining to the operations of the Edison Phonograph Toy Manufacturing Co., the production of phonograph batteries and cabinets, leasing arrangements and royalty payments, and production problems with the coin-operated phonograph. Other letters deal with mining and ore milling in Canada and at Ogden, N. J.; electric lighting; the mimeograph; the Sims-Edison torpedo; and the Edison-Lalande battery. The front cover is labeled "General Letter Book. T.A. Edison." The book contains 503 numbered pages and an index. Approximately 40 percent of the book has been selected.