Such is a brief summary of the observations made by the Spaniards during a week's residence in the city. They found themselves in the heart of a rich and populous empire, whose civilization, however, was, by a strange contradiction for which we shall hereafter endeavor to account, stained with the most shocking barbarity under the name of religion. The unscrupulous murder, which was dignified with the associations and practice of national worship, was by no means consolatory to the minds of men who were really in the power of semi-civilized rulers and bloody priests. They discovered, from their own experience, that the sovereign was both fickle and feeble, and that a caprice, a hope, or a fear, might suffice to make him free his country from a handful of dangerous guests by offering them as sacrifices to his gods. The Tlascalans were already looked upon with no kind feelings by their hereditary foes. A spark might kindle a fatal flame. It was a moment for bold and unscrupulous action, and it was needful to obtain some signal advantage by which the Spaniards could, at least, effect their retreat, if not ensure an ultimate victory. * * * * * News just then was brought to Cortéz that four of his countrymen, whom he left behind at Cempoalla, had been treacherously slain by one of the tributary caciques of Montezuma; and this at once gave him a motive, or at least a pretext, for seizing the Emperor himself, as a hostage for the good faith of his nation. Accordingly, he visited Montezuma with a band of his most reliable followers, who charged the monarch with the treachery of his subordinate, and demanded the apprehension of the cacique to answer for the slaughter of their inoffensive countrymen. Montezuma, of course, immediately disavowed the treason and ordered the arrest of the Governor; but Cortéz would not receive an apology or verbal reparation of the injury,--although he professed to believe the exculpation of Montezuma himself,--unless that sovereign would restore the Spaniard's confidence in his fidelity by quitting his palace and changing his residence to the quarters of the invaders! This was, indeed, an unexpected blow. It was one of those strokes of unparalleled boldness which paralyzed their victim by sheer amazement. After considerable discussion and useless appeals, the entrapped Emperor tamely submitted to the surprising demand, for he saw, in the resolved faces of his armed and steel-clad foes, that resistance was useless, if he attempted to save his own life, with the small and unprepared forces that were at hand.