"Captain Walker assures us that the country from the Colorado to the Rio Grande, between the Gila and San Juan, is full of ruined habitations and cities, most of which are on the table-land. . . . On that occasion he had penetrated about midway from the Colorado into the wilderness, and had encamped near the Little Red River, with the Sierra Blanca looming up to the south, when he noticed at a little distance, an object that induced him to examine further. As he approached, he found it to be a kind of citadel, around which lay the ruins of a city more than a mile in length. It was located on a gentle declivity that sloped towards Red River, and the lines of the streets could be distinctly traced, running regularly at right angles with each other. The houses had all been built of stone, but _all had been reduced to ruins by the action of some great heat, which had evidently passed over the whole country_. It was not an ordinary conflagration, but must have been some fierce, furnace-like blast of fire, similar to that issuing from a volcano, as the stones were all burnt--some of them almost cindered, others glazed as if melted. This appearance was visible in every ruin he met with. A storm of fire seemed to have swept over the whole face of the country, and the inhabitants must have fallen before it. In the centre of this city we refer to rose abruptly a rock of 20 or 30 feet high, upon the top of which stood a portion of the walls of what had once been an immense building. The outline of the building was still distinct. . . . All the south end of the building seemed to have been burnt to cinders and to have sunk to a mere pile of rubbish. Even the rock on which it was built appeared to have been partially fused by the heat." REMAINS FOUND UNDER LAVA BEDS. In an article which appeared in the San Francisco _Bulletin_ several years ago, Dr. D. L. Yates, says: