Among the many large stones picked up on the mounds of Sikyatki there was one the use of which has long puzzled me. This is a rough stone, not worked save in an equatorial groove. The object is too heavy to have been carried about, except with the utmost difficulty, and the probability of the former existence of a handle is out of the question. It has been suggested that this and similar but larger grooved stones might have been used as tethers for some domesticated animal, as the eagle or the turkey, which is about the only explanation I can suggest. Both of these creatures, and (if we may trust early accounts) a quadruped about the size of a dog, were domesticated by the ancient Pueblo people, but I have found no survival of tethering in use today. Eagles, however, are tied by the legs and not confined in corrals as at Zuñi, while sheep are kept in stone inclosures. It is probable that this latter custom came with the introduction of sheep, and that these stones were weights to which the Sikyatki people tied by the legs the eagles and turkeys, the feathers of which play an important part in their sacred observances. Certain small rectangular slabs of stone have been found, with a groove extending across one surface diagonally from one angle to another (plate CLXIX, _a_, _b_.) These are generally called arrowshaft polishers, and were used to rub down the surface of arrowshafts or prayer-sticks. Several of these polishers were taken from Sikyatki graves, and one or two were of such regular form that considerable care must have been used in their manufacture. A specimen from Awatobi is decorated with a bow and an arrow scratched on one side, and one of dark basaltic rock evidently came from a distance. A number of metates and mullers were found in the graves at Sikyatki. One of the best of the latter is shown in plate CLXX. These stones are of different degrees of fineness, and vary from simple triangular slabs of fine sandstone to very coarse lava. The specimen figured has depressions on the sides to facilitate handling.[157] Perhaps the most significant of all the worked stones found in the Sikyatki cemeteries were the flat slabs the edges of which near the surface of the soil marked the presence of the graves. These slabs may be termed headstones, but they have a far different meaning from those that bear the name of the deceased with which we are most familiar, for when they have any marking on their faces, it is not a totem of the dead, but a symbol of the rain-cloud, which is connected with ancestor worship. One of the best of these mortuary slabs has its edge cut in such a way as to give it a terraced outline, and on one face a similar terrace is drawn in black pigment. These figures are symbols of rain-clouds, and the interpretation of the use of this design in graves is as follows: