This letterbook covers the period April-August 1893. Most of the correspondence is by Edison and Walter S. Mallory, vice-president of the company. Their letters relate to equipment and supplies, building construction, Edison's financial situation, and personnel matters. All of Edison's letters are written in the hand of Mallory, except for two concerning the purchase of motors. Other items pertain to insurance on Edison's life, Edison's opinion of Michigan iron ore, and property leased in Michigan for the possible erection of an ore milling facility. One letter describes operations at the Edison Phonograph Works in West Orange and the qualities desired in its superintendent. The book contains 700 numbered pages and an index. Approximately 5 percent of the book has been selected.