This letterbook covers the period November1878-July 1879. Most of the letters at the beginning of the book are by company treasurer Charles E. Bailey. Most of the later correspondence is by Edward H. Johnson, who succeeded Bailey as treasurer early in 1879, There are also occasional letters by Painter, Gardiner G. Hubbard, Peter F. McCormick, and other company officials. Among the recipients are Painter, Hubbard, Charles A. Cheever, and Hilborne L. Roosevelt. Included are letters and reports pertaining to the management and financial affairs of the company and to sales of the phonograph. Some of the letters discuss the difficulties encountered in operating the machines properly. Also included are letters by Hubbard expressing his opposition to Edison's proposition to send Johnson to Great Britain to manage his telephone system. The front cover is marked "Phonograph. Treasurer. No. 3." The spine is marked "6." The book contains 692 numbered pages and is partially indexed. Less than 10 percent of the letters have been selected.