[Various (1971)] While recognizing the validity of geographical centers of elaboration and dispersal, and climax periods in cultural development, I think we have unequivocal evidence for varying degrees of coexistence and interaction on time levels, encompassing centuries, among our established cultural manifestations, certain of which I have especially referred to in this paper, since my point seems not to have been sufficiently stressed in some of my prior writings, or has, in some quarters, been received with skepticism. . REFERENCES Ashton, Roger 1970 The Oatman Site: A Single Component of the Late Archaic in Washington County, New York. The Bulletin , New York State Archaeological Association, No. 48, pp. 15-19. Ossining. Brennan, Louis A. 1962 A Beginning in Chronology for the Croton River Area. Pennsylvania Archaeologist, Vol. XXXII, Nos. 3-4, pp. 138-156. Gettysburg. __________ 1967 The Taconic Tradition and the Coe Axiom. The Bulletin, New York State Archeological Association, No. 39, pp. 6-15. Ossining. __________ 1968 The Twombly Landing Site. The Bulletin, New York State Archeological Association, No. 42, pp. 11-28. Ossining. __________, et al.