U. S. NATIONAL MUSEUM 



PROCEEDINGS. VOL. 77, ART. 5 PL. 16 



A. The Northwest Wall of Rooms 64-65 (which Later Collapsed) 

 WITH Beam Holes Marking the Floor Level of the second-story 

 Chamber 



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B. Many Betatakin Walls Were Erected Upon Such Shallow, pecked 

 steps as These, at the Southeast End of Rooms 101-102 



