Contains records relating to several mining companies owned and operated by Thomas Clark, followed by his George Murray Clark and granddaughter Juliet Belding Clark. Mine companies include the River Hill Mining & Milling Company, Gentle Annie Mining Group, Sherman Hill Mining and Milling Company, El Dorado Water & Deep Gravel Mining Company, and Grand Victory Gold Mining Company.

Number of containers: 7 cartons, 4 boxes, 2 oversize volumes and 1 oversize folder Linear feet: 11.6

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Collection is open for research.