"But they began developing the mines very soon after they captured the country," Fred remarked.

BRINGING ORE FROM THE MINES.

"Yes," responded Frank; "in the expedition commanded by Cortez there were many men who were familiar with the mines of Old Spain, and they were not long in finding the silver deposits of the New World. During the sixteenth century the mines of Mexico were extensively worked, and the working continued steadily down to the war for independence, when it greatly fell off. At the time of Humboldt's visit, in 1803, about 3000 distinct mines were in operation; Humboldt estimated that the product of silver in Mexico from the Conquest, in 1521, down to 1804 amounted to $2,027,952,000, and the estimate since that time brings the grand total up to more than 4,000,000,000!"

"What a lot of money!" exclaimed Fred. "Suppose we had it, and wanted to take it to New York; how could we carry it?"

MEXICAN BELLOWS.

"Wait a moment," was the reply, "and I'll tell you."