The view has been entertained by some who have given this subject attention that it was at this point in the progress of the migrations that Madoc and his followers finally became amalgamated with the Aztecs. Within the past few years, several visits have been made by the members of Wheeler's Surveying Expedition--Samuel Woodworth Cozzens and a few others--to the seven wonderful cities of the Moquis, situated near the Colorado Chiquito, in Arizona. Dr. Oscar Leow, chemist to Wheeler's Surveying Expedition, has contributed a brief but intensely interesting article to the "Popular Science Monthly" for July, 1874, on "The Moquis Indians of Arizona." By reference to the Indian reports, it appears that this nation has never been brought in contact with the Indian Bureau, nor with the Arizona agency, although within its jurisdiction. Small appropriations have recently been made for them; and it is likely that much more will soon be learned about them,--their habits, industries, language, and strange history. Their seven cities stand upon very high, precipitous cliffs of sandstone, which, when seen in the distance, present such bold fronts that it appears out of the question for any one to think of climbing them. As the traveller approaches, however, he discovers narrow and circuitous paths, which must be passed over single file, up and up, till the summit is reached. On this giddy height is the home of the Moquis. Dr. Leow terms it the "Gibraltar of the West," which the Navajos and Apaches have never been able to conquer. The Moquis number about two thousand five hundred. The cities rest on four sandstone _mesas_,--tables,--which are about eight miles apart. On the first table are three of the cities, named Tehua, Tsitsumo-vi, and Obiki; on the second are Mushangene-vi and Shebaula-vi; the third is Shongoba-vi; and on the fourth is Orai-vi. The houses are built in rows of two, three, and four stories in height, and constructed in terrace style, with the upper stories removed a few feet back from the lower ones. The sides fronting the bluffs are quite near, with only a narrow ledge along which to walk, and where the children were seen by the doctor, playing, unconscious of danger, while the mothers were within the houses performing their duties, though an awful gulf hundreds of feet in depth yawned beneath. Here the habitations are not built of adobe, like Indian and Mexican huts, but of stones firmly held in place by a cement of clay and sand. The stories are about seven feet high, divided into rooms, and each provided with a fire-place. Windows are cut into the walls about a foot square. The architecture of these stone houses bears a marked conformity with that of the ruder ages among the Welsh. The physical appearance of the Moquis is a nearer approach to that of the Caucasian than to that of the Mongolian race. The complexion is a light red-brown, and the countenance unusually intelligent.