This folder contains correspondence and other documents concerning the attempted sale of the Darby Mine and its machinery. The correspondents include John V. Miller; attorney Frank Denton; and prospective buyers. A few items refer to market conditions affecting the sale of cobalt- and silver-bearing properties in the Sudbury district of Ontario. Miller's outgoing letters may be difficult to read because of faint green ink.

Approximately 20 percent of the documents have been selected. The selected items are samples of letters discussing Edison's conditions for selling his property. The unselected material includes an amendment to the Ontario mining law and documents relating to routine tax and rental payments on mining properties.