The Mexican owners have lived well from the fortune of their mines. In fact, to them copper ore in the ground has been equivalent of cash in the bank. When they have wanted money they have dug into their ore bed. They generally smelted it themselves in crude clay furnaces, using charcoal burned near at hand. What of gold and silver there might be was also run into the copper bars and the bars were currency. A pile of bars meant rollicking jaunts and roystering junkets. The family and friends, the servants and retainers were gathered together, muskets and swords, horns and mandolins were assembled, horses and pack animals were loaded and bestridden, and a tour of the surrounding countryside was made. Bullfights, cockfights, balls and fandangoes were gloriously enjoyed, duels were fought, hearts were stormed and the copper ingots were blown in even to the last ounce. Then the company would return, the fast-locked door would again be opened and a new supply of copper extracted from the mine. Like princes lived these _Señores de las Minas_, so long as the earth yielded up her hidden treasure.
At this particular mine, this sort of thing has been going on for a hundred years. Generations have come and gone and come again, and the ore has not yet given out. But the thrifty ancestors so managed it as to pay only the smallest taxes to the government. Why should they pay good money into the itching palm of the distant despots, who might for the moment hold supreme power in the far-off capital! The first owner had “denounced,” (i. e. taken up), only half an acre. In the middle of this he cut the doorway to the mine. His descendants have always paid taxes on that half acre! The government never asked for more. Even Diaz was content. So the workings went on, and spread and ramified into the many acres surrounding the single so well-guarded entrance. The original half-acre had long years ago been mined out. And no one ever entered the mine or knew of its depth or latitude except the owner, who took the big key from his belt each workday morning and opened the ponderous wooden door. The Indians dug and sweated and smothered in the hot depths, even as their forbears had done. The Castrejon family held fast to the big key and enjoyed their credit for unbounded riches. La Mina el Puerto was a busy place, and its hospitality was equal to its wealth.