Leaving Tabasco Cortes sailed along the coast till he reached the spot where the city of Vera Cruz now stands, whence he opened communications with Montezuma, Emperor of the Aztecs. In due course envoys arrived from the monarch laden with magnificent gifts, who delivered a civil but none the less peremptory message requesting the Spaniards to return whence they came. By this time Cortes had learned that although the Aztecs were the greatest power in Anahuac, their supremacy was not acknowledged by all the tribes; notably was it contested by the Tlascalans and their allies the Otomies. The Tlascalans were republicans having their home in the mountains almost midway between Mexico and the coast. For fifty years or more they had been at bitter enmity with the Aztecs, who again and again had vainly attempted to subjugate them. To this people Cortes despatched an embassy asking for a safe passage through their territories on his road to Mexico, for his political insight told him that they might prove valuable allies. No answer was returned by the Tlascalans who when the Spaniards advanced attacked them furiously, only to be defeated by Cortes in several engagements, till, discouraged and believing the white men to be invincible, they sued for peace, and from enemies were converted into firm allies. From Tlascala the Spaniards proceeded to the neighboring city of Cholula where Marina discovered a plot to put them to death. For this offence Cortes took a terrible vengeance. Falling on the inhabitants of the city when they were unprepared he butchered vast numbers of them, giving their houses and temples to sack. Having thus established the terror of his name he marched on to Mexico accompanied by a body of about five thousand Tlascalan allies. Meanwhile the counsels of the Aztecs were darkened with doubt. The Spaniards might easily have been kept out of Mexico by force, but the arm of Montezuma was paralyzed by superstitious fears. Prophecy foretold that the children of the white god Quetzalcoatl should rise from the sea to possess the land, and in the Spaniards he beheld the fate fulfilled. To him they were not mortal but divine and when diplomacy had failed to keep them at a distance he feared to lift a sword against them. Thus it came about that without a blow being struck to drive them back Cortes and his little band of adventurers found themselves established at the heart of the strange and rich civilization that they had discovered, not as enemies, but as the guests of the king. They were not slow to avail themselves of the opportunities of their position in order to advance their ends which were, first plunder, secondly conquest, and, thirdly the extension of the authority of Spain and of the Christian religion. In pursuit of these ends upon some slight pretext Cortes seized the person of Montezuma, the great emperor, and imprisoned him in one of his own palaces whence, however, he was still allowed to direct the government