This folder contains correspondence and other documents relating to nickel- bearing properties in the Sudbury district of Ontario. Included are letters from Edison, George Hetherington, Walter S. Mallory, Robert Rafn, and attorney Frank Denton of Toronto. The letters by Edison contain comments about investors Charles M. Schwab and James Gayley. There are also mining reports by Cloyd M. Chapman, R. Howard Embree, and Raymond W. Seelye. The letters deal mainly with drilling operations, mining rights, land leases, equipment, and instruments.

Less than 10 percent of the documents have been selected. The unselected material relates to summer prospecting work by students from Yale University.