Spanish and Russian America 93 West Indies and parts of the mainland coasts were the first to be laid under contribution. Balboa, 1513, looked out over that Peaceful Ocean which Magellan, 1520, was to cross to the Philippines. From Nova Scotia to Cape Horn the Spanish captains had charted the seas, and two continents were ready to be made into an empire greater than any yet known to man. There were virtually no competitors for this magnificent gift of Pope Alexander VI. But Spain was unequal to the occasion. Her island plantations deteriorated. The natives, who were really enslaved, died off; negroes were expensive, and the mineral wealth of the mainland began to attract a host of grandees and adventurers who traversed the country in every direction in their ceaseless search for people to plunder and mines to exploit. The southern valleys were occupied by the invaders, and the silver of America compensated for the diamonds and spices of India. In every section of the country silver- mining became the great industry. Agriculture, pursued with native labour under the guidance of the Jesuit priests, thrived, and missions, mining-centres, and cattle ranches spread north as far as the arid belt which interposed an effectual barrier to northward progress. While Spain was declining in Europe, New Spain in America was steadily expanding. Her policy, however, was one of conquest, and her object the exploitation of the wealth of all the new lands. To settle her own free-born nationals on the soil seemed to be no part of her plan. The native population was not supplanted, it was merely used to furnish cheap labour. As late as 1768 the prosperous valley of Sonora in Northern Mexico had only 500 Spanish families distributed among a native population of large proportions. Lacking a firm foundation in the colonial soil and losing prestige and power