This letterbook covers the period February 1904-April 1913. It contains the outgoing correspondence of John V. Miller. Included are letters dealing with leases and tax payments in the Sudbury district of Ontario. Some of the correspondence relates to prospecting activities and the cessation of diamond-drilling operations. A few items concern the shipment of a phonograph and recordings to the mining camp in Blezard township, Ontario.

The spine is stamped "Letterbook." It is labeled "Mining Exploration Co. of N.J." and "February 13, 1904 To April 13, 1913." The book contains 500 numbered pages and an index; it has been used to page 248. Less than 5 percent of the documents have been selected.