equal height on the sides and ends, and terminating in a flat roof. The doorways opened upon the platform area or terrace when the building was single, and where it was carried around the four sides of an inclosed court they opened usually upon the court. As their elevation above the level of the surrounding area invested them with the character of fortresses, they were defended on the line or edge of the terrace-walls, or, rather, at the head of the flight of steps by means of which the summit-level was reached. Neither adobe brick, nor rubble masonry, nor timber roofs could withstand the tropical climate, with its pouring rains during a portion of the year. Stone walls and a vaulted ceiling were indispensable to a permanent structure. There were, doubtless, pueblos of timber-framed houses with thatched roofs here and there in Yucatan, Chiapas, and Honduras, as there were further south towards the Isthmus; but the prevailing material used was stone, as the number of small pueblos in ruins still attest. Upon these elevated platforms they enjoyed the same security as the Village Indians of New Mexico upon their roof-tops and within the walls of their houses. They were also raised above the flight of the mosquitoes and flies, the scourge of this hot region. Considering the surrounding conditions, single-storied houses upon raised platforms was a natural suggestion, harmonizing with a style of architecture, the communal character of which was predetermined by their social condition. For the details of this architecture reference must be made to published works, which are easily accessible, its general features and the principles from which they sprang being the only subjects within the scope of this inquiry.
The front elevation of the Governor's House at Uxmal, shown in the engraving, and which was taken from Stephens' work, will answer as a sample of the whole. It stands upon the upper of three platforms, of which the lowest is five hundred and seventy-five feet long, fifteen feet broad to the base of the middle platform, and three feet high. The second is five hundred and forty-five feet long, two hundred and fifty feet broad to the base of the upper platform, and twenty feet high. The third is three hundred and sixty feet long, thirty feet broad in front of the edifice, and nineteen feet high. The upper one is formed upon the back half of the middle platform, of which last Mr. Stephens observes that "this
