l62 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. I47 



was divided diagonally by a wattled partition that maintained access 

 from roof level of Kiva F, through Rooms 250 and 251, to Room 

 257, also divided, and to storeroom 181. Before introduction of the 

 Room 257 wattled dividing wall — 13 posts, 2-3 inches in diameter, 

 with imprints of willows bound to south face — the door to Room 182 

 had been blocked and plastered over and the northwest corner door 

 (pi. 15, right), silled with hewn pine planks, had been sealed from 

 Room 258. A 256 beam fragment ( JPB, No. 10) provided Dr. Doug- 

 lass with a tree-ring date of A.D. 1050 + x (Smiley, 1951). 



The partition dividing Room 256 was supported by nine posts to 

 which willows had been bound horizontally at intervals of about 15 

 inches and held in place by other willows lashed vertically to the 

 posts (pi. 25, right). Plastered with mud on the north face only 

 and still standing 5 feet high at its east end, this wattlework ob- 

 viously was designed to hold in check an accumulation of occupa- 

 tional debris piled behind it. One of its nine supporting posts pierced 

 a subfloor foundation carrying fourth-type masonry as it continued 

 from Room 256 eastward under 257 and 181. Vastly superior to the 

 crude post-and-mud walls of Old Bonito, these wattled partitions in 

 Rooms 256 and 257 are more in keeping with the vertical jacalwork 

 I have seen in Betatakin and Keet Seel, out in the Kayenta Country. 



Fourth-type masonry at its best is found in this section of Pueblo 

 Bonito. Portions of first-, second-, and third-story walls still stand 

 and their ceilings, doorways, and ventilators reflect the very acme of 

 Late Bonitian architectural experience. Friable sandstone, the chief 

 component of second-type masonry, has here been almost wholly 

 superseded by laminate sandstone, preferred because of its greater 

 hardness and natural cleavage. As always in Late Bonitian walls, the 

 hearting is rubble ; the exterior, laminate blocks fitted so snugly that 

 little mortar appears. But, however neat and precise this fourth-type 

 masonry, it was invariably covered with brown adobe mud. 



Ceilings in this latest addition were a composite of selected pine 

 logs and poles, split cedar and cedarbark, with mud to cover all and 

 provide a floor for the room above. One or two transverse beams 

 sufificed for the average room ; more in the larger. The ceilings of 

 Rooms 228 and 245 were supported by two pairs of beams; that of 

 244 by three pairs. 



The ceiling of Room 227, the lone survivor, is fairly typical of 

 fourth-type Late Bonitian ceilings. A single pine beam, 10 inches 

 in diameter, crosses the room from east to west at a height of 8 feet 

 5 inches (pi. 54, upper). Upon that beam and at right angles to 



