My survey of the grounds occupied by the aboriginal ruins in the valley of the Pecos indicates, as I have already stated, three epochs, successive probably in time, in which they have been occupied by man; that is, I have noticed these, and beyond these I have not been able to go as yet. Subsequent explorers may be more fortunate. This distinction, or rather classification, is very imperfect in the two earlier stages, and even arbitrary; but between the second and the last there is a marked break,--not in time, but in ethnological development. I shall term the three epochs as follows:-- 1. Pre-traditional. (Indicated by the presence of the corrugated and indented pottery as its most conspicuous "land-mark.") 2. Traditional and documentary. (Documents in the sense of written records.) 3. Documentary period. THE PRE-TRADITIONAL PERIOD. I have not been able to detect as yet among the confused traditions current about the pueblo of Pecos any tale concerning occupation of their grounds by human beings prior to the settlement of which the ruins now bear testimony. It is true that the proper traditions of the tribe of Pecos are now preserved only at the pueblo of Jemez, about eighty miles N.W. of Pecos and fifty miles W. of Santa Fé, and that I have not as yet visited that place.[131] But it must be remembered that I now report "up to date," and that subsequent information will, or at least should, come in time. My reason for admitting a pre-traditional period is, then, simply that I have found human remains at Pecos older than those of the present ruins and different in kind. These remains, as it may already have been inferred from the "personal narrative," are those found on the west side of the arroyo, in the basin (or rather the bank encircling it) opposite the rock carvings.