This letterbook covers the period April 1902-December 1902. It contains outgoing correspondence by John V. Miller. Among the recipients are Edison; Henry Ranger, a prospector; T. J. Ryan, a Department of Crown Lands agent; and John T. Hubbard, an attorney from Litchfield, Connecticut. Most of the letters pertain to nickel-bearing properties in Connecticut and the Sudbury district of Ontario. Included is correspondence relating to leases, deeds, and title transfers. There are also letters regarding prospecting, expenses, equipment, and supplies. A few items deal with recording machines manufactured at the West Orange laboratory. The selected items are primarily letters to John F. Ott concerning technical instruments.

The book contains 500 numbered pages and an index; it has been used to page 391. Less than 5 percent of the book has been selected.