82 BUREAU OF AMERICAN ETHNOLOGY [bull. 64 



discover how it had been entered from outside, as no trace of steps 

 remained. A ground plan of this chultun is shown in figure 27. The 

 small chamber, A, is 8 feet long, 7 feet broad, and 5 feet 6 inches 

 liigh in the center; it is cut out of sohd rock. The large chamber 

 (C) is 15 feet in diameter, but as nearly the entire roof has fallen 

 in, it is impossible to estimate its exact height. The chambers are 

 partially separated by a wall (B) built of rough blocks of stone and 

 tough mortar, which has been partly broken down. In the side of 

 the small chamber, opposite the wall, are three oblong shafts (D, D, D, 

 fig. 27) cut into the rock, by the side of the chamber wall, wliich 



Fig. 27.— Ground plan of chultun. 



is here nearly perpendicular. Each of these is about 1 foot in depth 

 by 8 to 9 inches in breadth, and is separated from the chamber by 

 a single row of bricks (E, E, E, fig. 27) mortared together, reach- 

 ing from the roof to the floor, so that there is no communication 

 between the shafts and the chamber. Each shaft opened origi- 

 nally on the surface of the ground, but the openings had become 

 blocked by vegetable refuse from the surrounding bush. The bricks 

 which fill in. one side of each shaft are of two kinds. The first, by 

 far the more numerous, are made of sun-dried clay, yellowish in color, 

 and very friable; they contain considerable powdered marl. They 

 measure 8 by 4 by 2 f inches. The bricks of the second kind also 

 are made of clay, mixed with many pebbles; they have been fired, 

 are of a reddish color, far harder and tougher than the first variety; 

 they measure 8 by 4 by 2^ inches. Nothing was found in either 

 chamber except a few potsherds of various kinds. 



