The White Chip — Nelson Nye

The Lost Dutchman was the most fabled gold mine of the Old West. Since Jacob Walzer struck gold in the Superstition Mountains of southwestern Arizona, hundreds of hopefuls had risked everything to comb the deadly mountains for it -- and many never came back. Finally an unlikely caravan made up of a banker, a seasoned miner, two merchants, a butcher, and a smuggler found the exhausted mine -- and a cleverly sealed-off entrance to its rich lode. The dizzying wealth was theirs for the taking. If they could retrieve it from the middle of an active volcano.