Cortez was still captain-general when Cabeza de Vaca came into the Spanish settlements from his eight years' wandering, with news of strange countries to the north; but Antonio de Mendoza was viceroy of Mexico, and Cortez' superior, and between him and the traitorous conqueror was endless dissension. Cortez was working for himself, Mendoza for Spain. As Mexico became more and more thickly dotted with Spanish settlements, the attention of the restless world-finders began to wander toward the mysteries of the vast and unknown country to the north. The strange things Vaca had seen, and the stranger ones he had heard, could not fail to excite the dauntless rovers to whom he told them. Indeed, within a year after the arrival in Mexico of the first transcontinental traveller, two more of our present States were found by his countrymen as the direct result of his narratives. And now we come to one of the best-slandered men of them all,--Fray Marcos de Nizza, the discoverer of Arizona and New Mexico. Fray (brother) Marcos was a native of the province of Nizza, then a part of Savoy, and must have come to America in 1531. He accompanied Pizarro to Peru, and thence finally returned to Mexico. He was the first to explore the unknown lands of which Vaca had heard such wonderful reports from the Indians, though he had never seen them himself,--"the Seven Cities of Cibola, full of gold," and countless other marvels. Fray Marcos started on foot from Culiacan (in Sinaloa, on the western edge of Mexico) in the spring of 1539, with the negro Estevanico, who had been one of Vaca's companions, and a few Indians. A lay brother, Onorato, who started with him, fell sick at once and went no farther. Now, here was a genuine Spanish exploration, a fair sample of hundreds,--this fearless priest, unarmed, with a score of unreliable men, starting on a year's walk through a desert where even in this day of railroads and highways and trails and developed water men yearly lose their lives by thirst, to say nothing of the thousands who have been killed there by Indians. But trifles like these only whetted the appetite of the Spaniard; and Fray Marcos kept his footsore way, until early in June, 1539, he actually came to the Seven Cities of Cibola. These were in the extreme west of New Mexico, around the present strange Indian pueblo of Zuni, which is all that is left of those famous cities, and is itself to-day very much as the hero-priest saw it three hundred and fifty years ago. At the foot of the wonderful cliff of Toyallahnah, the sacred thunder mountain of Zuni, the negro Estevanico was killed by the Indians, and Fray Marcos escaped a similar fate only by a hasty retreat. He learned what he could of the strange terraced towns of which he got a glimpse, and returned to Mexico with great news. He has been accused of misrepresentation and exaggeration in his reports; but if his critics had not been so ignorant