28 BUREAU OF AMERICAN ETHNOLOGY [bull. 7t 



Koom I, indicating that this wall was a part of a Inter construction 

 and probably the support of Floor A. 



Room I. — This is the main room of the structure. The western wall 

 is well preserved and the plaster covering the adobe is still to be seen 

 in many places (pi. 4, 5). The floor is also well preserved. There is 

 a curious break in the plaster of this floor, running around nearly 

 the whole room. The floor near the walls is slightly higher than that 

 in the middle of the room (pi. 1, sec. a-b). The uniform break in 

 the floor may be due to the destruction of a low step connecting the 

 higher floor near the walls with the floor in the middle. This is the 

 only explanation I can suggest to account for the even break around 

 the room. 



The projections in the western wall of Room I were probably in- 

 tended to lessen the distance to be bridged by the roof-beams. At 

 either end of the room the floor clearly indicates the former presence 

 of a single pillar. Similar supports are very frequent in the plans 

 of the rooms excavated at San Juan Teotihuacan. The width of the 

 outside rooms made at the northern and southern end by the pillars 

 is not equal, as may be seen on the plan. It is impossible to know to a 

 certainty whether there was an entrance to Room I at the northern 

 and southern ends. I have indicated in the plan no break in the out- 

 side wall of the building at these places. 



Room II. — Opening from Room I on the west through a well-de- 

 fined doorway is Room II. The original floor of this room is marked 

 D (pi. 1) and is the same level as the floor around the sides of Room I. 

 At the western side and at both ends of the room is another floor (C), 

 at a slightly higher level than Floor D (pi. 1, sec. e-f; pi. 8, c). A 

 narrow strip of the original floor (D) runs out to the northern wall 

 of the room in the northeastern corner. It seems probable that the 

 floor on the lower level once covered the entire room. The second 

 floor, as will be pointed out later, was probabW built to connect with 

 Floors B and B' on the south and north, Avhich are of the same level. 



Rooms III., IV (pi. 5, a) . — Opening from the southern end of Room 

 I is Room III, and from this in turn opens Room IV. The floor is 

 entirely gone from Room III and only partially preserved in Room 

 IV. The outer facing of the northern wall of these two rooms is still 

 in place. 



Rooms V, VI (pi. 5, b). — Corresponding to III and IV on the 

 south, Rooms V and VI open from Room I on the north. Room V is 

 the best preserved of any of the rooms in the building. Near the 

 center of Room VI there is a square formed of worked stones set 

 flush with the floor (pi. 7, &). This Avas found filled to the depth of 

 0.5 m, with ashes. This has previously been called a fireplace. No 

 shards were found in connection with the stones. 



