Sixty-one metres--200 ft.--north of our point of departure we strike stone foundations running about due east and west and resting almost directly on the rock, since the soil along the entire plateau which I have termed the neck is scarce, and has nowhere more than 1 m.--39 in.--in depth. The eastern corner of this wall, as far as it can be made out, is 12 m.--39 ft.--from the eastern wall of circumvallation. From this point on there extends one continuous body of ruins, one half of which at least (the southern half), if not two-thirds, as the ground plan will show, exhibits nothing else but foundations of small chambers indicated by shapeless stone-heaps and depressions. The northern part is in a better state of preservation; a number of chambers are more or less perfect, the roofs excepted,[102] and we can easily detect several stories retreating from east to west. About 9 m.--30 ft.--from its northern limits a double wall intersects the pile for one half of its width. The ruins beyond it, or rather the addition, is in a state of decay equal to that of the southern extremity. The western side is, generally, in a better state of preservation than the eastern, especially the north-western corner. Along the eastern side upright posts of wood, protruding from stone-heaps, often are the only indications for the outline of the structure. Along the north-west, however, such posts are enclosed in standing walls of stone, at distances not quite regularly distributed, but still showing plainly that here, at least, the outer wall presented an appearance similar to Pl. II., Fig. 4. At the place where I measured, the upright posts stood at about 1.39 m.--4 ft. 6 in.--from each other; the projecting wall was 2 m.--6 ft. 6 in.--long, and 0.63 m.--2 ft.--thick; the retreating wall 1.40 m.--4 ft. 6 in.--long, and 0.33 m.--13 in.--thick. The posts themselves were sometimes, but not always, backed, or even encased in adobe sheaths, built up like little chimneys in the wall itself. This mode of construction was possibly peculiar to the western side alone, and gives it a slight appearance of ornamentation, as well as more strength, the projecting walls acting like buttresses. The whole structure, taking the sides of the _débris_ as they are now scattered, extends nearly north and south 140 m.--460 ft.--and east and west about 16 m. to 26 m.--50 ft. to 80 ft.--thus forming a rectangle of 140 m. × 20 m.--460 ft. × 65 ft. To determine the exact size of the building I proceeded to measure each compartment for itself, judging that the total number of these apartments, adding to their sizes the thicknesses of the walls, would finally give, within a few decimetres, the exact length and width of the house. On the ground plan I have numbered this building B.[103]