This letterbook covers the period May-August 1910. Most of the correspondence is by Edison, Harry F. Miller, and George A. Meister. Many of the letters pertain to cement construction projects; ongoing progress in the development of molds and patterns for Edison's concrete house; the manufacture of Edison's improved alkaline storage battery and its use in automobiles, trucks, electric railway vehicles, submarines, and yachts; and the production of batteries in Germany. Among the items relating to personal and family matters are letters regarding Edison's health and finances and the upkeep of his winter home at Fort Myers, Florida. Also included is a letter to F. W. Keitel of the Farmers Land Co. in which Edison discusses his idea to provide irrigation water to farmers with a series of pumps run by small electric motors.

The label on the front cover contains the following notation: "T.A.E. Personal - From May 21st 1910 -To- August 29th 1910." There is an inscription on the spine with similar information. The book contains 698 numbered pages and an index. Approximately 10 percent of the book has been selected.