This folder contains correspondence and other documents relating to expenses, mining rights, land leases, and equipment. Included are letters from Edison, Walter S. Mallory, and John F. Randolph. Some of the documents convey Edison's instructions regarding drilling and rental payments. A few items pertain to the shipment of phonograph equipment and recordings to John V. Miller in Ontario. Also included is a request that Miller "use a different kind of ink" because some of his letters "are so blurred they are unreadable."

Less than 10 percent of the documents have been selected. The unselected items include correspondence concerning land leases and mining patents; reports from the Gertrude Mine; letters from attorney John T. Hubbard of Litchfield, Connecticut; employment applications; and purchase authorizations.