This collection consists primarily of letters exchanged between Edison and Secretary of the Navy Josephus Daniels, along with related correspondence. Many of the typewritten letters are accompanied by drafts in Edison's hand. The documents in this folder are from May-June 1918. They pertain to Edison's plan to use his system of mine detection (Report 52) to sweep the harbor in Guantanamo, Cuba.
This project is described on pp. 170-171 of Lloyd N. Scott's Naval Consulting Board of the United States.
[X128C55A], Letter from Thomas Alva Edison to Josephus Daniels, May 13th, 1918 1918-05-13
[X128C55B], Letter from Josephus Daniels to Thomas Alva Edison, May 23rd, 1918 1918-05-23
[X128C55C], Letter from Josephus Daniels to Thomas Alva Edison, June 6th, 1918 1918-06-06