This folder contains correspondence and other documents relating to operations at the Dunderland works. Most of the letters are to or from Edison and Stephen Hungerford Pollen, manager and secretary of the Dunderland Iron Ore Co., Ltd. There is also correspondence by James B. Ballantine, a former employee of the New Jersey and Pennsylvania Concentrating Works, and George Croydon Marks, Edison's patent agent. Many of the letters pertain to operating difficulties at the Dunderland works; some contain Edison's advice for correcting problems. Also included are proceedings of general meetings and debenture shareholders' meetings, along with other items concerning the financial condition of the company. Some of the letters contain comments regarding the work of William Simpkin, the draftsman responsible for executing Edison's designs, who committed suicide in 1908.

Approximately 70 percent of the documents have been selected.