_Typical plans._--All the Tusayan kivas are in the form of a parallelogram, usually about 25 feet long and half as wide, the ceiling, which is from 5½ to 8 feet high, being slightly higher in the middle than at either end. There is no prescribed rule for kiva dimensions, and seemingly the size of the chamber is determined according to the number who are to use it, and who assume the labor of its construction. A list of typical measurements obtained by Mr. Stephen is appended (p. 136). [Illustration: Plate LV. Matsaki, plan.] An excavation of the desired dimensions having been made, or an existing one having been discovered, the person who is to be chief of the kiva performs the same ceremony as that prescribed for the male head of a family when the building of a dwelling house is undertaken. He takes a handful of meal, mixed with piki crumbs, and a little of the crumbled herb they use as tobacco, and these he sprinkles upon the ground, beginning on the west side, passing southward, and so around, the sprinkled line he describes marking the position to be occupied by the walls. As he thus marks the compass of the kiva, he sings in a droning tone “Si-ai, a-hai, a-hai, si-ai, a-hai”--no other words but these. The meaning of these words seems to be unknown, but all the priests agree in saying that the archaic chant is addressed to the sun, and it is called Kitdauwi--the House Song. The chief then selects four good-sized stones of hard texture for corner stones, and at each corner he lays a baho, previously prepared, sprinkles it with the mixture with which he has described the line of the walls, and then lays the corner stone upon it. As he does this, he expresses his hope that the walls “will take good root hold,” and stand firm and secure. The men have already quarried or collected a sufficient quantity of stone, and a wall is built in tolerably regular courses along each side of the excavation. The stones used are roughly dressed by fracture; they are irregular in shape, and of a size convenient for one man to handle. They are laid with only a very little mud mortar, and carried up, if the ground be level, to within 18 inches of the surface. If the kiva is built on the edge of the cliff, as at Walpi, the outside wall connects the sides of the gap, conforming to the line of the cliff. If the surface is sloping, the level of the roof is obtained by building up one side of the kiva above the ground to the requisite height as illustrated in Fig. 21. One end of the “Goat” kiva at Walpi is 5 feet above ground, the other end being level with the sloping surface. When the ledge on the precipitous face of the mesa is uneven it is filled in with rough masonry to obtain a level for the floor, and thus the outside wall of some of the Walpi kivas is more than 12 feet high, although in the interior the measurement from floor to ceiling is much less.