I consequently started to examine the bluff, and finally noticed a plain wall jutting out at about one fourth of the length of the western curve from N. to S. This wall seemed at first to be a corner. It is well made, and its stone-work is much like that figured by Mr. Holmes from the cliff-dwellings on the Rio Mancos in South-western Colorado. Still the stones are not hewn, but only were carefully broken, the rock itself having a tabular cleavage. The surface is true. I am unable to say whether it was a corner or not; the thickness of the side (east) is 0.65 m.--2 ft.,--and it looks like a strong outside line running almost due N. and S., perhaps a little to the E. The height of the wall is 0.94 m.--3 ft.; its depth beneath the surface, 0.52 m.--21 in. The sod (covered with grama) looks undisturbed; it is hard and coarsely sandy on the top, but beneath the clay is softer and loamy. Under the wall there is red clay to the bottom of the bluff with bands of drift. Clambering along the cliff to the northward, I soon perceived, at a depth nearly agreeing with the base of the wall, a layer of white ashes, similar to those found over the hearthstone in building _B_, mixed with charcoal and charred pottery. This layer was continuous along the exposure of the bluff; it formed a regular seam, intersected horizontally by bands of charcoal, and, at the lower end, a continuous stratum of pottery totally different from that found hitherto, except one fragment in the drift of the creek and another one among the adobe rubbish of the church. Instead of being painted, it was corrugated and indented, and identical with the corrugated and indented ware from the Rio Mancos and from South-eastern Utah, so beautifully figured by Mr. W. H. Holmes. There were also a very few pieces of painted pottery: but these, which became more numerous towards the top of the bluff, or cliff, appeared to have been washed in; whereas the corrugated fragments were a distinct, continuous band, most of the convex surfaces being downwards; and this band, except where ledges of the cliff projected far out into the bottom, or where the clay had tumbled down recently in front of the exposure, was visible from 50 m.--165 ft.--N. of the wall to 62 m.--203 ft.--S. of it on a line of 110 m.--360 ft. It was everywhere accompanied by the ashes and charcoal. _A_, little barranca, exposing ashes, etc., which contained corncobs, and, in the upper parts of the clay, human bones. _a_, grave found by Mr. E. K. Walters, of Pecos; obliterated now. _B_, wall. _b_, place where skeleton of child was partly secured, five metres S. of _B_. _C_, southern barranca; no remains found. _c_, last sign south of pottery, ashes, and charcoal. _W_, rock carvings on west bank of the arroyo. The following are sections at four different places:-- [Illustration: Clay Pit Area]