Hunting for Hidden Gold - Franklin W. Dixon

Timber wolves,\n a Rocky Mountain blizzard,\n and a mine cave-in are only a few of the perils Frank and Joe Hardy encounter during their search for the members of a notorious gang responsible for a payroll robbery.\n \n In the old Montana mining camp of Lucky Lode,\n the young detectives puzzle over a series of mysterious events.\n A piano-playing ghost haunts the long-abandoned dance hall;\n eerie blue lights flash from the hilltop cemetery in the dark of night;\n strange men arrange a meeting at Shadow the Bear,\n and a suspect disappears through a curtain of frozen ice.\n \n Are these events related to the men who kidnapped the boys in Chicago on their way to Montana?\n Who booby-trapped the helicopter which flew the young detectives to the ghost town?\n And what ever happened to Bart D