This letterbook covers the period July 1890-April 1891. Most of the correspondence is by Harry M. Livor, general manager of the company. The letters deal mainly with the construction and equipment of the concentrating works at Ogden, New Jersey. There are also some progress reports submitted to Edison, president of the company. A portion of the company letterhead is affixed to the front cover and is inscribed "Letters H. M. Livor." The spine is stamped "Letters." The book contains 703 numbered pages and an index. Pages 329-697 are blank. Less than 5 percent of the book has been selected. Some of the typewritten letters in this book may be partially or completely illegible due to very light green ink, smeared ink, and discolored paper. Some of the handwritten letters may be partially or completely illegible due to spreading brown ink and discolored paper.