1932 _Artifacts of Pecos._ Robert S. Peabody Foundation for Archaeology. New Haven. Macgowan, K. and Hester, J. A. 1962 _Early Man in the New World._ New York. Renaud, E. B. 1942 _Reconnaissance Work in the Upper Rio Grande Valley, Colorado and New Mexico._ Archaeological Series, Third Paper, Department of Anthropology, University of Denver. Sellards, E. H. 1952 _Early Man in America._ Austin. Suhm, D. A. and Jelks, E. B. 1962 _Handbook of Texas Archeology; Type Descriptions._ The Texas Archeological Society, Special Publication Number One, and the Texas Memorial Museum, Bulletin Number Four, Austin. Wendorf, F. and others 1961 _Paleoecology of the Llano Estacado._ Fort Burgwin Research Center. Publication 1. Santa Fe. Wormington, H. M. 1957 _Ancient Man in North America._ The Denver Museum of Natural History. Popular Series No. 4. Denver. ACKNOWLEDGMENTS Permission to use illustrative material as listed below is gratefully acknowledged. The Denver Museum of Natural History: Figure 30, specimen 4; Figure 68, No. 5; Figure 70, Nos. 1, 2, and 3; Figure 71, Nos. 3 and 4; Figure 72, Nos. 1 and 3 from _Ancient Man in North America_ by H. M. Wormington, Denver, 1957. Oklahoma Anthropological Society: Plates 8F, 13D, 26F, 27C, 37F, 40D, and 41C from _Guide to the Identification of Certain American Indian Projectile Points_ by R. E. Bell, Special Bulletin No. 1, Norman, 1958. American Antiquity: Figure 1b from _A New Point Type from Hell Gap Valley, Eastern Wyoming_ by George A. Agogino, Vol. 26, No. 4, April 1961. Museum of New Mexico Press Santa Fe 1965 _Drawings by Helene Warren_ [Illustration: Endpapers] Transcriber’s Notes —Silently corrected a few typos. —Retained publication information from the printed edition: this eBook is public-domain in the country of publication. —In the text versions only, text in italics is delimited by _underscores_.