of ever obtaining any satisfactory information about these drawings and their date seemed very remote, but after watching and waiting for about eighteen years, I have recently received two letters that settle the whole matter so far as these particular ruins are concerned. Mr. Charles McLoyd, a very intelligent gentleman of Durango, Colorado, who has made a special study of the Cliff Dwellers and kindred subjects, in that part of the world, writing under date of January 10, 1895, says: “I am unable to inform you in regard to the pictures on those particular ruins, but can say that in no other locality have I found pictures of horses or anything to indicate that these prehistoric races had any knowledge of the animal. If such pictures existed we would be unable to determine anything definite from them; or in other words, it would not show that the horse was on this continent before the Spaniards brought him, but rather that the people who constructed the buildings lived here after the Spaniards came. I have often seen pictures of horses on the walls of cañons, but there is no question but they were the work of the present Indians. We often find associated with them pictures of railroad trains, etc., that indicate that some of them are of very recent date. To sum the matter up, would say that, so far, there is no evidence that these races had any knowledge of the horse, or had ever seen the Spaniards.” Mr. John A. Koontz, of Aztec, New Mexico, writes under date of January 24, 1895. He knows all about the ruins in question, for he owns the land on which they are situated, and puts the whole matter very clearly, as follows: “I know nothing of the drawings of horses and other animals on the walls of the ‘Aztec Ruins’ here that Mr. Wallace speaks of. I think the drawings were all in the imagination of the correspondent to whom Mr. Wallace refers. I have been familiar with the ruins for fourteen years and this is the first time I have ever heard of any drawings of horses on any of the walls. There are drawings on some rocks some miles from the ruins, but from their nature I have considered them the work of the modern Indians. These ruins were visited by a party of archeologists two years ago, who spent several weeks here, and made a survey, with maps and general drawings of the same. They decided that the main building had, originally, over seven hundred rooms.”