This letterbook covers the period May-June 1889. Most of the correspondence is by Edison and Alfred O. Tate. Many of the letters relate to the manufacture of the phonograph and talking doll and to the formation of phonograph sales agencies in the United States and abroad. Included are instructions for operating the phonograph and its battery and a draft agreement between Edison and the Edison Phonograph Toy Manufacturing Co. There are also letters pertaining to Edison's personal and financial affairs, including the purchase of property for his companies and the maintenance of his home and grounds at Fort Myers, Florida. Other documents deal with Edison's phonoplex system and his exhibit at the Paris Exposition. The book contains 500 numbered pages and an index. Approximately 40 percent of the book has been selected.