This folder contains correspondence and other documents relating to the business of the Edison Phonograph Works. Many of the items, including a series of reports from the Pinkerton National Detective Agency, pertain to a strike at the Works that began in September. A representative sample of the Pinkerton reports has been selected.

Approximately 25 percent of the documents have been selected. Among the items not selected are routine letters concerning bills, notes, and bonds, including one letter by Samuel Insull regarding the sale of Edison Phonograph Works stock.