The woodwork proper appears not to have had any connection with the strength or support of the walls, but simply to have been erected within and among the walls as a scaffold for the ceilings, which are also the floors of the higher stories. Upright posts of cedar and pine, stripped of their bark, but not squared, are, as I have already shown, set inside of the stone wall, at more or less even distances. As far as I could ascertain, these distances are regulated by the size of the rooms. These posts are coarsely hacked off at the upper end, and over them other similar beams are laid longitudinally, sometimes fitted over the posts with chips wedged in. Such is the case in a room in the northern wing of the building marked _A_, of which I shall hereafter speak.[109] On these longitudinal beams other ones rest, laid transversely, and imbedded in the wall on the opposite side. On these again longitudinal poles are placed, also at intervals varying according to the dimensions of the chambers, and on them transversely, a layer of brush, or splinters of wood, closely overlapping each other; and the whole is capped by about .20 m.--8 in.--of common clay or soil. Pl. III., Fig. 1, is a front view of the wooden scaffold in a lower story room, and of the ceiling which it supports. _a_, clay and lower seam of brush or splinters. _b_, transverse poles or beams, in case the beams are lacking. _c_, longitudinal beam. _d_, upright posts. In most cases, however, the beams are transverse and the poles longitudinal, and this is where the beam (_c_) is lacking, as in the interior apartments, where the ceiling appears as in Pl. III., Fig. 2: _a_, clay; _b_, brush or splinters; _c_, poles; _d_, beams; _e_, wall.[110] The diameter of the upright posts is, on an average, 0.28 m.--11 in.,--but even sometimes as great as 0.33 m.--13 in.,--the longitudinal and transverse beams are scarcely less thick, whereas the poles are about 0.05 m.--2 in.--across. The splinters seem to have been obtained by splitting a middle-sized tree, and tearing out thin segments. [Illustration: PLATE III SECTIONS OF BUILDING B.] Pl. III., Fig. 4, is a ground plan of the floor of room marked _I_ on the diagram. This room is on the eastern row of the third floor, therefore an outer room. _c_, longitudinal poles. _d_, the end of the transverse beams projecting from the other room. _e_, the transverse beams, resting in the wall on both sides. On the latter rested a thin layer of brush and a compact mass of clay, 0.20 m.--8 in.--thick. The clay, or rather soil, is very hard and was probably stamped or pounded.