This letterbook covers the period March 1902-January 1903. Most of the correspondence is by Edison and John F. Randolph. There are also letters by Walter S. Mallory, John V. Miller, and others. Many of the items relate to the planning, construction, and financing of the Edison Portland Cement Co. plant at Stewartsville, New Jersey. There is also correspondence concerning the technical development of Edison's alkaline storage battery, arrangements for its manufacture and sale in the United States and Great Britain, and its use in electric vehicles, as well as letters pertaining to the organization of the Mining Exploration Co. of New Jersey to finance Edison's search for nickel in the Sudbury district of Ontario and other locations. Also included are letters regarding the erection of the iron ore concentration plant in the Dunderland region of Norway, in connection with the Edison Ore Milling Syndicate, Ltd., along with other items pertaining to Edison's interest in ore milling, mines, and ores. There are a few letters dealing with the domestic phonograph business and with Edison's efforts to sell his stock in the Edison Gower-Bell Telephone Co. of Europe. Among the items relating to family and personal matters are several letters to Lord Kelvin concerning a dinner and a tour of the West Orange laboratory.

The label on the front cover contains the following notation: "Personal Letter Book of Thomas A. Edison From Mar 14, 1902 To January 9, 1903." There is a label on the spine with similar information. The book contains 496 numbered pages and an index. Approximately 20 percent of the book has been selected.