Between the years 1540 and 1542, an expedition was undertaken for the subjugation of an important nation which it was alleged existed far to the north of Mexico. A Franciscan missionary, Marcos de Naza, reported that he had discovered, north of Sonora, a rich and powerful people inhabiting a realm known as Quivara, or the seven cities, whose capital, Cibola, was quite as civilized as an European city. After the report had reached and been considered in Spain, it was determined to send an armed force to this region in order to explore, and if possible to reduce the Quivarans to the Spanish yoke. Mendoza had designed to entrust this expedition to Pedro de Alvarado, after having refused Cortéz permission to lead the adventurers,—a task which he had demanded as his right. But when all the troops were enlisted, Alvarado had not yet reached Mexico from Guatemala, and, accordingly, the viceroy despatched Vasquez de Coronado, at the head of the enterprise. At the same time he fitted out another expedition, with two ships, under the orders of Francisco Alarcon, who was to make a reconnoisance of the coast as far as the thirty-sixth degree, and, after having frequently visited the shores, he was, in that latitude to meet the forces sent by land.
Coronado set forth from Culiacan, with three hundred and fifty Spaniards and eight hundred Indians, and, after reaching the source of the Gila, passed the mountains to the Rio del Norte. He wintered twice in the region now called New Mexico, explored it thoroughly from north to south, and then, striking off to the north east, crossed the mountains and wandering eastwardly as far north as the fortieth degree of latitude, he unfortunately found neither Quivara nor gold. A few wretched ruins of Indian villages were all the discoveries made by these hardy pioneers, and thus the enchanted kingdom eluded the grasp of Spain forever. The troop of strangers and Indians soon became disorganized and disbanded; nor was Alarcon more successful by sea than Coronado by land. His vessels explored the shores of the Pacific carefully, but they found no wealthy cities to plunder, nor could the sailors hear of any from the Indians with whom they held intercourse.
In 1546, a desolating pestilence swept over the land, destroying, according to some writers, eight hundred thousand Indians, and, according to others, five-sixths of the whole population. It lasted for about six months; and, at this period, a projected insurrection among the black slaves and the Tenochan and Tlaltelolcan Indians, was detected through a negro. This menaced outbreak was soon crushed by Mendoza, who seized and promptly executed the ringleaders.
A portion of the Visitador Sandoval's orders related to the convocation of the Mexican bishops with a view to the spiritual welfare of the natives, and the prelates were accordingly all summoned to the capital, with the exception of the virtuous Las Casas, whose humane efforts in behalf of the Indians, and whose efforts to free them from the slavery of the repartimientos had subjected him to the mortal hatred of the planters. The council of ecclesiastics met; but it is probable that their efforts were quite as ineffectual as the humane decrees of the Emperor, and that even in the church itself, there may have been persons who were willing to tolerate the involuntary servitude of the natives rather than forego the practical and beneficial enjoyment of estates which were beginning to fall into the possession of convents and monastaries on the death of pious penitents.
Meanwhile the population of New Spain increased considerably, especially towards the westward. It was soon perceived by Mendoza that a single Audiencia was no longer sufficient for so extended a country. He, therefore, recommended the appointment of another, in Compostella de la Nueva Gallacia, and in 1547, the Emperor ordered two letrados for the administration of justice in that quarter. The ultimate reduction of the province of Vera-Paz was likewise accomplished at this period. The benignant name of "True Peace" was bestowed on this territory from the fact that the inhabitants yielded gracefully and speedily to the persuasive influence and spiritual conquest of the Dominican monks, and that not a single soldier was needed to teach them the religion of Christ at the point of the sword.
During the two or three following years there was but little to disturb the quietness of the colony, save in brief and easily suppressed outbreaks among the Indians. Royal lands were divided among poor and meritorious Spaniards; property which was found to be valueless in the neighborhood of cities was allowed to be exchanged for mountain tracts, in which the eager adventurers supposed they might discover mineral wealth; and the valuable mines of Tasco, Zultepec, and Temascaltepec, together with others, probably well known to the ancient Mexicans, were once more thrown open and diligently worked.
The wise administration of the Mexican viceroyalty by Mendoza had been often acknowledged by the Emperor. He found in this distinguished person a man qualified by nature to deal with the elements of a new society when they were in their wildest moments of confusion, and before they had become organized into the order and system of a regular state. Mendoza, by nature firm, amiable, and just, seems nevertheless to have been a person who knew when it was necessary in a new country, to bend before the storm of popular opinion in order to avoid the destruction, not only of his own influence, but perhaps of society, civilization and the Spanish authorities themselves. In the midst of all the fiery and unregulated spirit of a colony like Mexico, he sustained the dignity of his office unimpaired, and by command, diplomacy, management, and probably sometimes by intrigue, he appears to have ensured obedience to the laws even when they were distasteful to the masses. He was successful upon all occasions except in the enforcement of the complete emancipation of the Indians; but it may be questioned whether he did not deem it needful, in the infancy of the viceroyalty at least, to subject the Indians to labors which his countrymen were either too few in number or too little acclimated in Mexico to perform successfully. History must at least do him the justice to record the fact that his administration was tempered with mercy, for even the Indians revered him as a man who was their signal protector against wanton inhumanity.
Whilst these events occurred in Mexico, Pizarro had subjugated Peru, and added it to the Spanish crown. But there, as in Mexico, an able man was needed to organize the fragmentary society which was in the utmost disorder after the conquest. No one appeared to the Emperor better fitted for the task than the viceroy whose administration had been so successful in Mexico. Accordingly, in 1550, the viceroyalty of Peru was offered to him, and its acceptance urged by the Emperor at a moment when a revolt against the Spaniards occurred among the Zapotecas, instigated by their old men and chiefs, who, availing themselves of an ancient prophecy relative to the return of Quetzalcoatl, assured the youths and warriors of their tribe that the predicted period had arrived and that, under the protection of their restored deity, their chains would be broken. In this, as in all other endeavors to preserve order, the efforts of Mendoza were successful. He appeased the Indians, accepted the proffered task of governing Peru; and, after meeting and conferring with his successor, Velasco, in Cholula, departed from Mexico for the scene of his new labors on the distant shores of the Pacific.