The upper and lower faces of the stone are substantially but not exactly, parallel. It also shows one angle, which is substantially, but not exactly a right angle and it was so adjusted that the long edge was on the doorway and short one in the wall of a chamber or apartment, with the right angle at the corner between them. This stone was evidently prepared by fracture, probably with a stone maul, and the regularity of the breakage was doubtless partly due to skill and partly to accident. It shows no marks of the chisel or the drove, or of having been rubbed, and where the square is applied to the sides or angles the rudeness of the stone is perfectly apparent.

Fig. 41a represents a sandstone cut by American skilled workmen in the form of a brick, and it is intended to show by comparison the great difference between the dressed stone of the civilized man and the ruder stone of the mason in the condition of barbarism. The comparison shows that no instruments of exactness were used in the stone work of the pueblo, and that exactness was not attempted. But the accuracy of a practiced eye and hand, such as their methods afforded, was reached, and this was all they attempted. With stones as rude as that shown in the figure, a fair and even respectable stone wall may be laid. The art of architecture in stone is of slow and difficult growth. Stone prepared by fracture with a stone hammer precedes dressed stone, which requires metallic implements. In like manner mud mortar or adobe mortar precedes a mortar of lime and sand. The Village Indians of America were working their way experimentally, and step by step, in the art of house-building, as all mankind have been obliged to do, each race for itself; and the structures the Village Indians have raised in various parts of America, imperfect as they are by contrast, are highly creditable to their intelligence.

Stone lintels were not used for these doorways, as stones three feet long would have been required. No stones of half that length are to be seen in any of the walls. They had, however, the idea of a stone lintel, for they used them in this structure over the foot-square openings for light and air. We found a stone lintel over an opening eighteen inches wide in a cliff house on the Mancos River. This was so firmly imbedded that we found its removal impossible. They used for a lintel six round cedar cross-pieces, Fig. 42, each about four inches in diameter and now perfectly sound.

[Illustration: Fig. 42.—Section of Cedar Lintel.]

In some of these doorways we noticed a peculiar feature. On the side toward the external wall, one and sometimes two of these wooden lintels were placed, four and sometimes six inches lower than the remainder, so that on entering from the outside room into the second room, the top of the doorway rose higher as the room was entered. A necessity was experienced to save the head from bumps, and the wonder is that it did not occur to them to raise the doorways to the height of the body. As the doorways were always open, no doors being used, it may well be that larger openings would have created stronger currents of air through the building than they wished. The ends of these lintels were hacked off by stone implements of some kind.

The peculiar arrangement of the doorways tends to show that this great house was divided into sections by the partition walls extending from the court to the exterior wall; and that the rooms above were connected with those below by means of trap-doors and ladders. If this supposition be well founded, the five rooms on the ground floor; from the court back; communicated with each other by doorways. The four in the second story communicated with each other in the same manner, and with those below through trap-doors in the floors. The three rooms in the third story communicated with each other by doorways, and with those below as before. The same would be true of the two rooms of the fourth story. It seems probable that the connected rooms were occupied by a group of related families.

We afterwards found the same thing nearly exemplified in the present occupied Pueblo of Taos, in New Mexico. We found that the families lived in the second and upper stories, and used the rooms below them for storage and for granaries. Each family had two, four, and six rooms, and those who held the upper rooms held those below.

In the south wing before mentioned, several rooms on the ground floor are still perfect, with the ceilings in place upholding the rubbish above. The openings or trap-doorways of two of these rooms are still perfect, but the ladders are gone. The rooms had been opened, us elsewhere stated, by late explorers. One of these trap-doors measured sixteen by seventeen inches, and the other sixteen inches square. Each was formed in the floor by pieces of wood put together. The work was neatly done. These rooms were smaller than the rooms above. Some were as narrow as four feet six inches, others six feet, showing that one room had been divided into two. The basement rooms were probably occupied for storage exclusively, whence their division. They were dark, except as light entered through the trap-doorway from above.

The structure connecting the wings and bounding the court was evidently a single or double row of apartments. This is shown by the amount of fallen material, which is larger than a wall would require, and from pits or depressions which plainly marked the outline of apartments.

There are two circular estufas in the main building, one twenty-three feet and the other twenty-eight feet in diameter. A part of the wall of the first estufa is still standing. It is of stone, mostly of blocks about five inches square, and laid in courses, with considerable regularity. The work is equal to the best masonry in the edifice. In the open court, and near the outer structure, bounding it in front, is another estufa of great size, sixty-three and a half feet in diameter. These estufas, which are used as places of council, and for the performance of their religious rites, are still found at all the present occupied pueblos in New Mexico. There are six at Taos, three at each house, and they are partly sunk in the ground by an excavation. They are entered through a trap-doorway in the roof, the descent being by a ladder.