sentences:  The Humboldt smelter operation went through a half decade of reorganization after the Panic of 1907 deflated the local mining boom.Revival came during the high mineral market prices of the World War I era, when the smelting plant operated in conjunction with the Blue Bell Mine, the one productive copper mine in the Bradshaw Mountains.The train connected the mine, located south of Mayer, with the smelter, which kept the town prosperous.