TO/.zER] EXC^AVATION AT SANTIAGO AHUITZOTLA, MEXICO 35 



rooms for the lowest levels of the site. A description of the floors 

 found and, in a few cases, the walls will alone be attempted. The 

 lowest floors are far less well preserved than those above. They are 

 usually very uneven and vary much in thickness. There are many 

 breaks which can not always be explained. The tunnels and the 

 floors found are shown in plate 2. 



Floors in Tunnels n-p. — The lowest construction apart from the 

 wells is under a part of the Northern Terrace running to the north 

 under Floor B' (Tunnels n-p). At this place there was clearly a 

 room the dimensions of which could be ascertained with some cer- 

 tainty, 3.7 m. east and west and 3.1 m. north and south. The southern 

 side of the room in Tunnel o is marked by the remains of a stone wall, 

 one of the few cases where the wall of one of the lowest rooms may 

 be studied. The limits of the western side of the room are shown in 

 Tunnel n, while the eastern side of the room is in Tunnel p. The 

 edge of this floor is clearly marked by a line of Avorked stones set 

 flush with the floor. There is a decided rise in the floor at the north- 

 eastern corner. 



Floor P. — From the southwestern corner of the room just de- 

 scribed and 0.7 m. above it begins a curiously wandering floor (P") 

 in Tunnel / under Room Y. This floor is uneven and very narrow\ 

 It is impossible to determine the dimensions or character of the room 

 of Avhich it was a part. The floor continues under Floor A (P'). 

 The western side is still marked by two stones (pi. 2, 22) set at the 

 edge. Here also are two round elevations in the floor (21, 21' : also 

 pi. 2, sec. i-j) formed by stones set in plaster on the surface of the 

 floor. No explanation can be offered for these protuberances. The 

 same floor (P) continues into the open cut made to the south of 

 Floor A and, turning westward, enters Tunnel / (P^)- It is here 

 hardly more than a plaster-covered wall separating Floors Q and Q'. 

 Still continuing westward in Tunnel e (P*) it comes out in the open 

 Pit XVII and is lost under the wall of earth left between the excava- 

 tion and the modern road. P'' is probably a part of the same floor 

 in Tunnel /? and separated from P* by a break. The eastern side 

 alone is visible in Tunnel h until Tunnel i is reached, when the 

 Avestern side is marked by a break separating it from another piece 

 of floor (P'') at the same level. This floor, starting under Room V 

 and continuing under the nortliAvestern corner of the Patio and 

 under Rooms I and II, covers so large an area that it may at one 

 time liaA'e been continuous under all the central part of the site. 



Floor B. — This is a small piece of plaster flooring in Tunnel / 

 under one of the stone buttressed walls on the Avestern side of the 

 Patio. This floor is 0.15 m. below P^ The loAver floor, Q, bounds 

 it on the Avest while the northern side ends at the edge of the higher 



