wall against the wear of weather is seen in the preservation of external whitewashing for several feet below such a cornice on the face of the walls. At the pueblo of Acoma a similar extensive use of projecting cornices is met with, particularly on the third story walls. Here again it is due to the use of adobe, which has been more frequently employed in the finish of the higher and newer portions of the village than in the lower terraces. As a rule these overhanging copings occur principally on the southern exposures of the buildings and on the terraced sides of house rows. When walls rise to the height of several stories directly from the ground, such as the back walls of house rows, they are not usually provided with this feature but are capped with flush copings. [Illustration: Plate LXXII. Fragments of ancient masonry in Pescado.] The rapid and destructive erosion of the earthen roof covering must have early stimulated the pueblo architect to devise means for promptly distributing where it would do the least harm, the water which came upon his house. This necessity must have led to the early use of roof drains, for in no other way could the ancient builders have provided for the effectual removal of the water from, the roofs and at the same time have preserved intact the masonry of the walls. Unfortunately we have no examples of such features in the ruined pueblos, for in the destruction or decay of the houses they are among the first details to be lost. The roof drain in the modern architecture becomes a very prominent feature, particularly at Zuñi. [Illustration: Fig. 39. Single stone roof drains.] [Illustration: Fig. 40. Trough roof drains of stone.]