This folder contains documents, primarily correspondence, relating to activities at the Ogden works. Most of the letters are to or from Walter S. Mallory, vice president, and Edison. Some of the letters concern experiments with grease cups, tests of the elevator, and work in the machine shop. Other letters discuss Joseph Wharton's interest in hematite and his order of Edison's ore. Also included are an undated typescript entitled "The Present Situation of Mr. Edison's Undertaking is as Follows"; and a letter from Edison to James C. Parrish, presented as an example of the letters sent to prospective investors in an attempt to finance additional bricker ovens. Approximately 50 percent of the documents have been selected. Courtesy of Thomas Edison National Historical Park.