Patterns of discovery, 1863-1864
Mills to Montana, 1865, I : the Ragland, Cope, and Napton Mining Company of Boonville, Missouri, and the New York and Montana Mining and Discover Company of New York City, New York
Mills to Montana, 1865, II : the Clark and Upson, and the Nelson Mining companies of Hartford, Connecticut
Further development of the district, 1866 : the Herschel Mining Company of Virginia City, Montana, the Golden Ore Mining & Prospecting Company of Montana (Brooklyn, New York), and Hall and Spaulding of Meadow Creek, Montana
Expansion of the district and new investors, 1866 : the Midas Mining Company of Rochester, New York
The Midas Mining Company, 1867
Increased competition and doubt, 1867 : the McAndrew and Wann Mining Company of New York City, New York
The mood in the district, autumn 1867
Decline of the district, 1868.