This mound, it is stated, stood on the ground now occupied by the plaza major. East of it was another large mound, and the Spaniards laid the foundation of the city between these two, because, as it is assigned, the stones in them were a great convenience in building, and economized the labour of the Indians. These mounds were so large, it is added, that with the stones the Spaniards built all the edifices in the city, so that the ground which forms the plaza major remained nearly or quite level. The buildings erected are specified, and it is added that there was abundance of material for other edifices which the Spaniards wished to erect. Other mounds are mentioned as obstructing the laying out of streets according to the plan proposed, and there is one circumstance which bears directly upon this point, and, in my opinion, is conclusive. In the history of the construction of the Franciscan convent, which was founded in the year 1547, five years after the arrival of the Spaniards in Tihoo, it is expressly stated that it was built upon a small artificial mound, one of the many that were then in the place, on which mound, it is added, were _some ancient buildings_. Now we must either suppose that the Spaniards razed these buildings to the ground, and then constructed this strange arch themselves, which supposition is, I think, utterly untenable, or that this corridor formed part of the ancient buildings which, according to the historical account, stood on this artificial mound, and that for some purpose or other the monks incorporated it with their convent.