“Four miles westerly [from Mitchell ranch], near the ranch of Mr. Shirt, are the ruins of another large stone pueblo, together with an Indian cemetery, where each grave is marked by a border of flat stones set level with the ground in the form of a parallelogram 8 feet by 4 feet. Near the cluster of nine pueblos shown in the figure are found strewn on the ground numerous fragments of pottery of high grade in the ornamentation, and small arrowheads of flint, quartz, and chalcedony delicately formed, and small knife blades with convex and serrated edges in considerable numbers. “This is an immense ruin with small portions of the walls still standing, particularly of the round tower of stone of three concentric walls, incorporated in the structure, and a few chambers in the north end of the main building. The round tower is still standing nearly to the height of the first story. In its present condition it was impossible to make a ground plan showing the several chambers, or to determine with certainty which side was the front of the structure, assuming that it was constructed in the terraced form.... The Round Tower is the most singular feature in this structure. While it resembles the ordinary _estufa_, common to all these structures, it differs from them in having three concentric walls. No doorways are visible in the portion still standing, consequently it must have been entered through the roof, in which respect it agrees with the ordinary _estufa_. The inner chamber is about 20 feet in diameter, and the spaces between the encircling walls are about 2 feet each; the walls are about 2 feet in thickness, and were laid up mainly with stones about 4 inches square, and, for the most part, in courses. There is a similar round tower, having but two concentric walls, at the head of the McElmo Canyon, and near the ranch of Mr. Mitchell [Mitchell Ruin].” As the name Mud Spring is locally known to the natives, especially to employees of livery stables and garages, the ruin is here called Mud Spring. The tower and the other circular buildings are united to other rooms as in similar groups of mounds. The presence of surface depressions, thought to indicate circular kivas,[20] shows that the Mud Spring mounds are remains of a village of the same type as the Mummy Lake group, but with towers united to the largest mounds. [19] Op. cit., p. 190. [20] Although the kivas of Mud Spring Ruin have not been excavated there is little doubt from surface indications that they belong to the unit type.