The fragment of a pipe shown in plate CLXXIII, _d_, is interesting in the same connection. The end of this pipe is broken, but the stem is intact, and on two sides of the bowl there are elevations covered with crosshatching. The pipe is of clay and has a rough external surface. It is improbable that these pipes were always smoked as the _wu-kó-tco-ño_ of the Snake ceremony, but the smaller end was placed to the mouth, and smoke taken into the mouth and exhaled. It is customary in ceremonials now practiced, to wind a wisp of yucca about the stem of a short pipe, that it may not become too hot to hold in the hand. This may be a possible explanation[161] of the scratches on the sides of the ancient tube pipes from Sikyatki. PRAYER-STICKS One of the most important objects made in the secret ceremonials of the modern Pueblos is sacrificial in nature, and is called a paho or "water wood," which is used as an offering to the gods (figure 357). These pahos are made of a prescribed wood, of length determined by tradition, and to them are tied appendages of symbolic meaning. They are consecrated by songs, about an altar, upon which they are laid, and afterward deposited in certain shrines by a special courier. [Illustration: FIG. 357--Mortuary prayer-stick (natural size)] In modern times the forms of these pahos differ very greatly, the shape depending on the society which makes them, the god addressed, and the purpose for which they are used, as understood by the initiated. Among many other uses they are sometimes mortuary in character, and are deposited in the graves of chiefs, as offerings either to the God of Death, or to other deities, to whom they may be presented by the shade or breath body of the deceased. This use of pahos is of ancient origin in Tusayan, as shown by the excavations at Sikyatki, where they were found in mortuary bowls or vases deposited by the relatives or surviving members of the sacerdotal societies to which the deceased had belonged.