Works of "Research Collection"
Place Collected: Rio Pinto Papayan
Place Collected: California
Place Collected: Cripple Creek Dist.
Place Collected: Coffee Creek Mine
Place Collected: Smoky Hill Mine
Place Collected: Fortune Mine
Place Collected: Cripple Creek Dist.
Place Collected: Vulcan's Throat
Place Collected: Smuggler Mine
Place Collected: Massachusetts Hill