This folder contains correspondence and other documents relating to mines and ores to be bought, sold, worked, or tested. Many of the items deal with the mining interests of individuals or companies who wanted to lease or sell property to Edison or to have their ores tested. Most of the selected documents received a significant response from Edison.
Approximately 20 percent of the documents have been selected. Some of the unselected letters contain marginal notes by Edison requesting samples of ores, indicating that he will send a surveyor to the property, or giving notice that a survey showed the mine to be unsuitable. Also not selected are routine letters and reports from the firm of Pilling & Crane regarding ore tests and mine investigations done on behalf of Edison. Courtesy of Thomas Edison National Historical Park.