Figures are painted on the white plastering of the third story of room 11 and on the lower border of the banquette of kiva I, the former being the most elaborate mural paintings known in cliff-dwellings, showing several symbols which are reproduced on pottery. A reversed symbolic rain-cloud figure, painted white, occurs on the exterior of the low ledge house.[27] Mural paintings of unusual form are found on the under side of the projecting rock forming part of the floor of room 3, and there are scratches on the plastering of the wall of kiva K. The latter figures were intended to represent animals, heads of grotesque beings, possibly birds, and terraced designs symbolic of rain clouds. As one or more of these symbols occur on pottery fragments, there appears no doubt that both were made by the same people. Among rock markings may also be mentioned shallow, concave grooves made by rubbing harder stones, which can be seen on the cliffs in front of rooms 92 and 93 and in the court west of room 51. [Footnote 27: This figure resembles closely that on the outside walls of the third story of room 11 of Spruce-tree House. (See pls. 4, 5, 6, _Bulletin 41, Bureau of American Ethnology_.)] Among the figures painted on whitewashed walls of room 11 may be mentioned triangles, parallel red lines with dots, and a square figure, in red, crossed by zigzags, recalling the designs on old Navaho blankets. The parallel lines are placed vertically and are not unlike, save in color, those which the Hopi make with prayer meal on the walls of their kivas, in certain ceremonies. But it is to be noted that the Hopi markings are made horizontally instead of vertically, as at Cliff Palace. The dots represented on the sides of some of these parallel lines (room 11) are similar to those appearing on straight lines or triangles in the decoration of Mesa Verde pottery. The triangular figures still used by the Hopi in decorating the margins of dados in their houses also occur on some of the Cliff-Palace walls, but are placed in a reversed position. They are said to represent a butterfly, a rain cloud, or a sex symbol. It is interesting to note in passing that two or more triangles placed one above another appear constantly in the same position in Moorish tile and stucco decorations, but this, of course, is only a coincidence, as there is no evidence of a cultural connection. [Illustration: PLATE 13 PHOTOGRAPHED BY R. G. FULLER _a_ Third story of square tower, showing dado and decoration _b_ Deflector and flue of kiva DETAILS OF CLIFF PALACE] REFUSE HEAPS Almost every Mesa Verde cliff-dwelling has an unoccupied space back of the rooms,[28] as in the rear of rooms 28 to 40, which served as a depository for all kinds of rubbish. Here the inhabitants of Cliff Palace also deposited certain of their dead, which became mummified on account of the dryness of the air in the cave.