In most places we were able to determine the relative ages of the buildings. On many sites there were traces of the earliest erections marked by fallen mounds. There was often a middle period between these and that represented by the buildings still standing. At Chichen there were, as we have said, two distinct periods, but these were obviously far apart in date. Those of the first period were probably in building within a century of the arrival of the foreign architects; and fell probably at or about the time the second set of buildings were put up. Structures built in the manner of those standing at Chichen to-day could not by any possibility remain intact in a climate like Yucatan's, if indeed anywhere, for a period longer than about six hundred years. Thus, if they were built about the eighth or ninth century they would be far advanced in ruin at the Conquest.
After a most careful survey, we think that the ruins of Chichen standing to-day were built at or about the fall of Mayapan (1426 or 1462). There was no doubt a great recrudescence of building throughout Yucatan after this event. History affords many examples of the fact that a great victory is celebrated by the conquerors, on their return to their centres, setting up temples and palaces commemorative of their success. The dissensions and intrigues leading up to the overthrow of the powerful cacique of Mayapan had probably for some years before that event checked building enterprise throughout the Peninsula. At the conclusion of the war an impulse to city-beautifying was experienced. Probably the next greatest chief of Yucatan, after the vanquished lord of Mayapan, was the cacique of the Itzas of Chichen, and on the success of the confederation, of which it may be presumed he was an important member, he built himself a new city on the site of his already decaying one. At about the same time the group of cities of the south, Uxmal, Kabah, Labna and Sayil, were restored or rebuilt. The building zeal during the century previous to the Conquest seems to have reached a high pitch. The outlying ruins in Yucatan such as El Meco, Tuloom, those on Isla de Mujeres, and those which we discovered on the islands of Cozumel and Cancun, represented an outer ring of Mayan civilisation. Their builders had evidently never learnt the art of the finest carving. The ruins are peculiarly devoid of ornamentation, and the whole style is uncouth and suggests crudity. In a like manner a rough knowledge of building spread far into the south. Thus to-day, between big ruined centres such as Copan, Piedras Negras, and Palenque, we find smaller towns some of the buildings of which are still intact.
What happened in Mexico? The knowledge of building had spread over the whole of the plateau within the few centuries succeeding the founding of Copan. There would only be the one period, the one wave of building which would wash into Mexico before news of the wonderful art reached the ears of the ever-warlike Aztecs, to whom such accounts would suggest much wealth and a country worth pillaging. They may have found the wealth of Mexico in its then undeveloped state disappointing, but they evidently quickly grasped the advantage stone houses had over skin wigwams always needing repair and always draughty. Conquering the Mayans and christening them Toltecs, they set them to work to build cities. Aztec deities were, for the most part, substituted for the Mayan gods. Such blood-loving gods as Huitzilopochtli, in whose honour the historians assert tens of thousands of human beings were sacrificed, were purely of Aztec origin. The serpent-worship so dear to the Aztecs' forefathers, the Shoshonees, was much more in evidence than it had ever been among the Mayans. Very speedily the influence of the warlike Aztecs spread over the country southward until, as some historians say, they reached Mayapan in Yucatan. Certainty they must have reached Honduras, where Dr. Gann, British Commissioner at Corosal, told us he had found distinct traces of Aztec culture. But this was at a period not many years before the coming of the Spaniards. It may even have been so late that Cortes, who was destined to be the conqueror of these conquering upstarts, the Aztecs, had already heard of wonderful Yucatan, which had been termed "Isla Rica," and which, a few years later, formed the stepping-stone to his complete, if inglorious, conquest of Mexico.
Summarising, then, the arguments of this chapter, we would venture to say that the building civilisation of Central America flourished between the eighth century and the coming of the Spaniards in 1517. The sequence of cities, as near as can be judged, would be as follows:
1. Copan and Quirigua, the first, or among the first, erected during the eighth century.
2. Piedras Negras and Yaxchilan, with possibly some undiscovered, follow closely in date.
3. The ruins of Palenque, probably contemporaneous with the last-mentioned groups, was a city from the earliest building period, but its palace was restored or rebuilt at a much later date.
4. The mounds of fallen débris found throughout Yucatan represent the first buildings in that country, and date from about the ninth to the eleventh century.
5. Those buildings that have more recently fallen represent the middle age of the building civilisation, dating from the twelfth to the fourteenth centuries.
6. Those buildings standing to-day belong to the latter day period, and date from the beginning of the fifteenth century until the coming of the Spaniards in 1517.