Mark Twain,
Roughing It — Chapter XXVI
(1872)
“ Each mountain range is gorged with the precious ores. Humboldt is the true Golconda. The other day an assay of mere croppings yielded exceeding four thousand dollars to the ton. A week or two ago an assay of just such surface developments made returns of seven thousand dollars to the ton. Our mountains are full of rambling prospectors. Each day and almost every hour reveals new and more startling evidences of the profuse and intensified wealth of our favored county. The metal is not silver alone. There are distinct ledges of auriferous ore. ”
