18 BUREAU or AMERICAN ETHNOLOGY [bull. 74 



eastern corner and the northern side were next uncovered (pi. 7, h). 

 The western side was then excavated, thus completing the square. 



As this was going on Floor B (pi. 5, a) was found and cleared. 

 Owing to the symmetry of the rooms in the Main Structure inclosed 

 by the Terrace, it was considered probable that a floor corresponding 

 to B would be found on the north, and Floor B' (pi. 6, h) was noted 

 exactly similar in height and position to B. 



The floors of the Terrace on the northwestern and southwestern 

 corners were followed and the northern and southern additions (XII 

 and X) to the Terrace were uncovered. Room X on the south led 

 the way to Floor H and Room IX (pi. 6, a). Room XI was entered 

 through the doorway from Room IX. Excavations were made to 

 the south of IX and Rooms VII and VIII were found. A wide 

 trench was then made to the south of VII, VIII, and XI. No 

 floors were found, thus showing that the southern limit of the site had 

 been reached. A trench was also made to the east of XI, where 

 pieces of rough flooring (L, L', L") were found with no remains of 

 a wall. Excavations along the southern side and eastern end of 

 Floor B showed no remains, thus marking the southeastern limits 

 of the site. 



Four trenches were next run out at right angles to the Eastern, 

 Terrace iji order to ascertain the limits on this side (pi. 2, sec. k-^). 

 Several pits were dug near the eastern and northern sides of Floor 

 B', but no remains were found until Floor O was reached. 



The entire western side of the site was limited by the road. The 

 various floors were followed in each case until they were lost under 

 the road or broken by the cutting of the road. Excavations were 

 undertaken in the milpa on the opposite side of the road. Shards 

 and other objects, together with large pieces of floor, were found, 

 shiowing that the site continued for some distance to the west. No 

 floor was found in place, so that coordination with the floors in the 

 main excavation was impossible. In this excavation to the west of 

 the road the stratum of ashes which runs under the Main Structure 

 was encountered approximately 1.45 m. below the floor level of Room 

 IX. Adobes and pieces of tepetate were also found. This excava- 

 tion was 6.5 m. from the western edge of Room IX. 



In many places, as noted on the plans, the walls are still standing. 

 The plaster covering of the w^alls is still in place in many cases. It 

 was usually very easy to trace the walls which had fallen, together 

 with the pillars, as in every case the floor rose slightly as it ap- 

 proached the wall (pi. 8, &). These upward slopes of the floor end 

 at the wall and in very few cases does the floor continue under the 

 wall. There is no distinction in the plan between the walls still 

 standing and those walls which are clearly indicated by this upward 

 slope of the floor. Both are shown in full black. 



