Nothing besides foundations, heaps of stones defining corners, and upright posts protruding along the western limits of _L_ and _K_ inside, remain of these structures. _L L_ are of the size of the ordinary chambers; _K K_ are four times larger. Their interior shows no partition whatever: the soil is level, somewhat depressed in the centre of each apartment; and on the whole they present very much the same appearance as those structures on the "neck," which lie to the west of B, but are not connected with the latter. Besides, the enclosures are on a lower level than the two rows of rooms immediately east of the wall _m N_. This wall itself is a double wall, each single one being of the size of the ordinary partition; the total width is therefore 0.56 m.--22 in.,--as proven by actual measurement. The idea is therefore suggested--very naturally--that the entire western wing of the building _A_ was originally a double house,[119] terraced both towards the east and the west. In sketching the cross-sections, I have taken due notice of this very probable, if not positive, fact. The double wall _m N_ shows no trace of lateral passages. It therefore divides the whole structure from _H_ to _N_ into two longitudinal sections. The western one, from _o_ to _p_, consisted of but one row of 5 rooms; from _p_ to _N_ it had two rows of 16 chambers each. The ground slopes still further to the S. and S.W. outside of the trapezoidal enclosures, _I I_, and is covered with _débris_; so that I presume that, from _ll_ to _N_, there was an additional row of 3 rooms on the outside. The entire division was at one time very completely razed to the ground, so that its owners never attempted to rebuild it after the original plan. The western division was also badly damaged in its southern half, but the damage was subsequently repaired with the aid of material and mechanical arts postdating the Spanish conquest of New Mexico. Pl. V., Fig. 3, gives a view of the western end, along the line _h h_. I would recall here the fact already noticed, that the northern part of building _B_ is also mended in places with adobes of the same make as those used in repairing the western wing of _A_, and that, while the squared beams are wanting, the stone-work there in places appears also of a more recent date. The suggestion may therefore not be uncalled for, that the same destroying power which spent its main force on _A_, distinct from the general decay, and moving in a direction from S.W. to N. E., reflected or glanced off upon the northern portions of _B_. This question will, however, be discussed hereafter.