sentences:  The Val Verde post office was renamed Humboldt in 1905 to honor Baron Alexander von Humboldt, who had visited New Spain early in the 19th century and predicted that greater riches would be found to the north (interpreted by early twentieth century promoters as the Bradshaw Mountains region).Around this time the town of Humboldt began to develop.The smelter and the railroads into the Bradshaws created probably the most widespread mining boom in the county.