Bartlett was unable to obtain but a partial plan of the Casas Grandes. One class of apartments, however, attracted his especial attention, from the fact that they were evidently designed for granaries. They were arranged along one of the main walls, and measured twenty feet in length by ten in breadth. They were connected by doorways “with a small inclosure or pen in one corner, three or four feet high.” Numerous long and narrow apartments, too contracted for sleeping or dwelling-rooms, lighted by circular apertures in the upper walls, are supposed to have been devoted to the same use. Large inclosures, too extensive in their dimensions ever to have been roofed, evidently were used as courts. Two hundred feet west of the Casas, on the plateau, are the remains of a building about 150 feet square, divided into compartments, as shown in the accompanying plan: Between this edifice and the main building, are three mounds of loose stones about fifteen feet high, which the explorers did not have time to open. For a distance of twenty leagues and covering an area of ten leagues wide along the Casas Grandes and Janos Rivers, according to García Condé, are ruins resembling small mounds, from which jars, pottery in various forms, painted with white, blue and scarlet colors, corn-grinders (metates), and stone-axes have been taken. If this region was ever occupied by the Aztecs, even temporarily, this latter class of remains might more properly be attributed to them, than the Casas Grandes. Innumerable fragments of pottery, superior to that now manufactured by the Mexicans, are strewn everywhere in the neighborhood of the Casas Grandes. The decoration is in black, red or brown, on a white or reddish ground. Several graceful and highly artistic vases have been collected about the ruins, and stone metates, nicely hewn, have been recovered in perfect condition. On the summit of the highest mountain, ten miles south-west of the ruins, stands an ancient fortress of stone, the walls of which are said by the writer in the _Album Mexicano_ to have been from eighteen to twenty feet thick. The fort, which is attributed to the occupants of the Casas Grandes, was two or three stories, and in the centre had a high mound for the purposes of observation. Clavigero, who describes the fort and all of the ruins from hearsay, falls into the error of supposing the Casas to have also been constructed of stone. A short distance from the point where the 111° (meridian) of longitude crosses the Gila River, in Southern Arizona, in the valley occupied farther westward by the Pima villages, stands the most famous ruin of all the Western remains. The Casa Grande, otherwise named the Casa de Montezuma, has attracted the attention of and furnished a fruitful subject for most writers on Mexican antiquity, the majority of whom, however, have contributed nothing to our knowledge of the history or uses of the edifice. Of describers at second-hand, Mr. Bancroft has