This letterbook covers the period December 1897-August 1898. Most of the correspondence is by Walter S. Mallory, vice-president of the company. The letters deal mainly with personnel matters, equipment, and supplies. Many of the letters pertain to operations, experiments, and tests at the Ogden works. Some items relate to the quality of the iron ore briquettes, safety equipment for mill employees, and work done for the New Jersey Zinc Co. Other letters concern potential ore separating plants in the Midwest and Edison's interest in Canadian iron mines. There is also a letter detailing company strategy in regard to insurance policies. The spine is stamped "Letters" and is labeled "Dec 21, 1897 to Aug 13, 1898." The book contains 498 numbered pages and an index. Approximately 15 percent of the book has been selected.