On top of a knoll in the mountains south of Nacori, at an elevation of 4,800 feet, well preserved remains of this kind of dwelling were seen. The house, consisting of but one room about ten feet square, was built of large blocks of lava. The largest of these were eighteen inches long, and about half as thick, and as wide. The walls measured about three feet in height and one foot and a half in thickness, and there was a sufficient amount of fallen stone debris near-by to admit of the walls having been once four or five feet high. There were the traces of a doorway in the northwest corner of the building. Numerous fragments of coarse pottery were scattered around, some gray and some red, but without any decoration, except a fine slip coating on the red fragments.
In the Sierra de Nacori, on the summit of a steep knoll, and at an elevation of about 6,500 feet, we found two huts of such laid-up walls. The rough felsite blocks of which they were composed were surprisingly large, considering the diminutive size of the cabins. We measured the largest block and found it to be two feet long, ten inches wide, and eight inches thick. There were many others almost as large as this one. But there was only one tier of stones left complete in place. Although there were well-built trincheras in all the surrounding arroyos, there were no traces of either tools or pottery on that hill.
On the western slope of the Sierra de Nacori, on top of another knoll, and at an elevation of 6,400 feet, we found numerous rude ground plans, some of which showed rubble walls fifteen inches thick. They formed groups of four or five apartments, each ten by twelve feet. But on the north side of that summit there was a larger plan, nearly eighteen feet square; however, the outlines of the entire settlement were not distinct enough to enable us to trace its correct outlines.
Many fragments of pottery lay about, but neither in number nor in interest could they be compared with those found near the ruins in the southwest of the United States, for instance, near the Gila River. Some of the potsherds were one-third of an inch thick, and large enough to show that they had been parts of a large jar. They were made of coarse paste, either gray or brown in colour. Some had a kind of rude finish, the marks of a coarse fibre cloth being clearly discernible on the outside. Others were primitively decorated with incisions. One sherd of really fine thin red ware was picked up, but there was no trace of ornamentation on it. We found, besides, a few cores of felsite and some shapeless flakes and several fragments of large metates.
In the valley formed between the mountains on the upper Bavispe River we met with very many such houses. The clusters which we came across seemed to have been composed of a larger number of houses. Parapets, also built of undressed stones and surrounding these villages, now became a constant feature. Even within sight of our camp was such a parapet, six feet high, and house ruins were near by. We also discovered an ancient pueblo consisting of thirty houses, all of the usual small dimensions, but not all alike in shape. Some were round, others triangular, but most of them were rectangular, measuring eight by ten feet. Along two sides of this village ran a double wall, while the other two sides were bound by a single wall constructed on the same principle. Evidently these walls were built for the protection of the people in time of war.
About five miles south of our camping place the river turns eastward, and again two miles below this point it receives a tributary from the west. One day I followed the broken cordon on its eastern bank, then turned north and ascended an isolated mountain, which rises about fifteen hundred feet high above the river. There is a small level space on top, and on this there has been built, at some time, a fortress with walls of undressed stones from two to six feet high and three feet thick. It was about fifty paces long in one direction, and about half that length in the other. Remains of houses could be traced, and inside of the walls themselves the ground plan of three little chambers could be made out.
On the Bavispe River we photographed a trinchera which was about eight feet high and thirty feet long; and one of the foremen observed one which was at least fifteen feet high.
I decided to move the camp one and a half miles down the river, and to its right bank, on a cordon, where Mason, one of my Mexican foremen, had discovered some ruins. It was very pleasant here after the rather cool bottom of the valley, which in the morning was generally covered with a heavy fog. On this ridge were many traces of former occupancy, parapet walls and rude houses divided into small compartments. The parapets were lying along the north and south faces of the houses, and just on the brink of the narrow ridge. On the south side the ridge was precipitous, but toward the north it ran out in a gentle shallow slope toward the next higher hill. The building material here is a close-grained felsite, and huge fragments of it have been used in the construction of the parapets. These boulders were, on an average, thirty-five inches long, twenty-five inches thick and fifteen inches wide; while the stones used in the house walls measured, on the average, fourteen by nine by seven inches.
On the western end of the ridge is a small house group, which, for convenience sake, I will designate as “Mason’s Ruins.” They showed a decidedly higher method of construction, and the walls were better preserved, than in any we had seen so far. The ground plans could be readily made out, except in a small part of the southwest corner. These walls stood three to five feet high, and the stones here too were dressed only by fracture. They were laid in gypsiferous clay, a mass of which lay close to the southwest corner. This clay is very similar to the material used by the Moquis in whitening their houses. The stones themselves were felsite, which abounds in the locality. The blocks have an average size of twelve inches square by six inches thick. It should be noted that no regard was paid to the tying of the corners and the partition walls; but considerable care had been taken in making the walls vertical, and the angles were fairly true. The walls were almost twelve inches thick, and on the inner side they had evidently never been plastered.
