CUMBERLAND MINE Castle Mountain District. Meagher County. Minerals Yearbook 1943. Page 404. Crude ore shipped direct to East Helena. Idle since 1892, reopened by lessees in 1943. (Lead and silver ore).
WPA, "Cumberland Mine" (1943). Minerals Yearbook, All. 209.
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Cumberland Mine, Castle Mountain District, Meagher County, lead, silver ore, East Helena