This entire wing (forming a rectangle of 62 m. × 8.38 m.--203 ft. × 27 ft., if we add to the spaces given the thicknesses of the transverse partitions, this time not included in the measures) has given me more trouble than the rest of _A_ and _B_ combined. Nowhere are the walls so twisted and out of range as here. Besides, there is an unfinished air about it that is almost bewildering. The height of the stories does not agree with that of the other sections,--the western wing would be one story lower. Furthermore, it contains in several places squared beams of wood inserted in the stone-work lengthwise. These beams (of which there is also one in the opposite wing similarly embedded) are identical and apparently of the same age with the (not sculptured) beams still found in and about the old church. Entire walls of chambers, or rather sides, appear to be new; the mud or adobe is fresh, whereas almost everywhere else it has disappeared, out of the crevices even; the stones are almost laid in courses. As I shall hereafter relate, there are at several places adobe walls, the adobe containing wheat-straw! And all this right among chambers showing sides as uncouth and old as any of the pueblo, though still as high as their more recent and better preserved neighbors. Here there is evidently patchwork of later date, and patchwork executed with material unknown to the Indians previous to the advent of the Spaniards. I am even convinced that it was done after 1680; for the beams evidently came from the church or the convent, which buildings we know were sacked and fired by the Indians in the month of August of that year. If this conclusion be correct, the south-western part of _A_, its entire westerly wall, was somehow destroyed after 1680, and partly rebuilt with materials unknown to the Indians at the time when Pecos was first erected. I say partly, because there is evidence that the western wing, from _H_ to _N_, was originally much broader. As it now appears, the wall _m h_ presents itself as the western line of the structure. But there are, still further out, although distinctly connected with it, remains of buildings which were at least attached to it. These are the ruined enclosures designated on the ground-plan by _I_, _K_, and _L_.