[Louis A. Brennan et al. (1962)] Since no later middens occur in this vicinity we must further assume that after this time, conditions at Kettle Rock were never again by reason of climate and/or water conditions, favorable to the establishment of oyster beds. The Orient Complex of Long Island, in some pottery of which Ritchie has found Vinette I resemblances, has been dated at approximately 3000 B. P. But the Orient Complex pottery is, technically at least, later than Vinette I. Therefore, when we search for a period of cooling trend of climate in which to place our Kettle Rock, Vinette I-like pottery we must look for a period before 3000 B. P. Consulting the graphs of the geologist Rhodes W. Fairbridge, published in The Massachusetts Archaeological Bulletin of April-July, 1960, we find that sea level began to drop, hence the climate to cool, at about 3500 B. P. Ergo our Vinette I-like pottery at Kettle Rock dates at about or just subsequent to that time, say no later than 3300 B. P. This confirms the chronology for the Croton River mouth area placed by us before this conference last year, whereby our Parham Ridge site, a manifestation of our Q or quartzite tradition, with its steatite and no ceramics, dates from the younger Peron High of 3800 B. P. Thus, the sequence of heaps of larger oyster shell lying under, and separated from the smaller shells by soil horizons must be in the order of dates we have estimated, stretching back to about 6000 B. P.