This folder contains correspondence and other documents relating to mining and ore milling. Some of the documents deal with the business of the Edison Ore Milling Co., Ltd. Among these is a report regarding the proposed reorganization of the company. Related material can be found in the Edison Ore Milling Co. Minute Book (Company Records Series) and in Letterbook, LM-005 (Letterbook Series).

Approximately 20 percent of the documents have been selected. The following categories of documents have not been selected: routine correspondence regarding ore samples sent to Edison for assaying; routine financial documents; correspondence offering to sell mining properties to Edison; routine notices for meetings of the board of directors.