Prospecting for Gold Near Washington, DC.
Map: Gold Mining in the Great Falls of Maryland (circa 1898) by Walter A. Goetz, 1975, 1 page, available for $1.50 plus postage ... (The York County Department of Parks and Recreation sponsors a Gold Panning Seminar at Spring Valley County Park on the last Saturday of July from 9 a.m. until 2 p.m) Rock Collecting Sites - Pennsylvania
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