In the remains of the ancient pueblos there is no evidence of the use of the half-open terrace rooms described above. If such rooms existed, especially if constructed in the open manner of the Tusayan examples, they must have been among the first to succumb to destruction. The comparative rarity of this feature in Zuñi does not necessarily indicate that it is not of native origin, as owing to the exceptional manner of clustering and to prolonged exposure to foreign influence, this pueblo exhibits a wider departure from the ancient type than do any of the Tusayan villages. It is likely that the ancient builders, trusting to the double protection of the inclosed court and the defensive first terrace, freely adopted this open and convenient arrangement in connection with the upper roofs. [Illustration: Fig. 79. Rude transoms over Tusayan openings.] [Illustration: Plate XCII. An inclosing wall of upright stones at Ojo Caliente.] The transom-like opening commonly accompanying the large opening is also seen in many of the inclosed doorways of Tusayan, but in some of these cases its origin can not be traced to the roof constructions, as the openings do not approach the ceilings of the rooms. In early days such doorways were closed by means of large slabs of stone set on edge, and these were sometimes supplemented by a suspended blanket. In severe winter weather many of the openings were closed with masonry. At the present time many doorways not provided with paneled doors are closed in such ways. When a doorway is thus treated its transom is left open for the admission of light and air. The Indians state that in early times this transom was provided for the exit of smoke when the main doorway was closed, and even now such provision is not wholly superfluous. Fig. 80 illustrates a large doorway of Tusayan with a small transom. The opening was being reduced in size by means of adobe masonry at the time the drawing was made. Fig. 81 shows a double transom over a lintel composed of two poles; a section of masonry separating the transom into two distinct openings rests upon the lintel of the doorway and supports a roof-beam; this is shown in the figure. Other examples of transoms may be seen in connection with many of the illustrations of Tusayan doorways. [Illustration: Fig. 80. A large Tusayan doorway with small transom openings.] [Illustration: Fig. 81. A doorway and double transom in Walpi.]