Mr. Cushing had found displaced fragments of such circular stone doorways at ruins some distance northwest from Zuñi, but had been under the impression that they were used as roof openings. All examples of this device known to the writer as having been found in place occurred in side walls of rooms. Mr. E. W. Nelson, while making collections of pottery from ruins near Springerville, Arizona, found and sent to the Smithsonian Institution, in the autumn of 1884, “a flat stone about 18 inches square with a round hole cut in the middle of it. This stone was taken from the wall of one of the old ruined stone houses near Springerville, in an Indian ruin. The stone was set in the wall between two inner rooms of the ruin, and evidently served as a means of communication or perhaps a ventilator. I send it on mainly as an example of their stone-working craft.” The position of this feature in the excavated room of Kin-tiel is indicated on the ground plan, Fig. 60, which also shows the position of other details seen in the general view of the room, Pl. C. A small fragment of a “stone-close” doorway was found incorporated into the masonry of a flight of outside stone steps at Pescado, indicating its use in some neighboring ruin, thus bringing it well within the Cibola district. Another point at which similar remains have been brought to light is the pueblo of Halona, just across the river from the present Zuñi. Mr. F. Webb Hodge, recently connected with the Hemenway Southwestern Archeological Exposition, under the direction of Mr. F. H. Cushing, describes this form of opening as being of quite common occurrence in the rooms of this long-buried pueblo. Here the doorways are associated with the round slabs used for closing them. The latter were held in place by props within the room. No slabs of this form were seen at Kin-tiel, but quite possibly some of the large slabs of nearly rectangular form, found within this ruin, may have served the same purpose. It would seem more reasonable to use the rectangular slabs for this purpose when the openings were conveniently near the floors. No example of the stone-close has as yet been found in Tusayan. The annular doorway described above affords the only instance known to the writer where access openings were closed with a rigid device of aboriginal invention; and from the character of its material this device was necessarily restricted to openings of small size. The larger rectangular doorways, when not partly closed by masonry, probably were covered only with blankets or skin rugs suspended from the lintel. In the discussion of sealed windows modern examples resembling the stone-close device will be noted, but these are usually employed in a more permanent manner.