Five charred maize cupules and four cob fragments were recovered from Feature 19, a hearth, found near the bottom of Unit II (Ezzo and Deaver 1998:23, 57, Table 3). This date is on some of the cupules from this feature.
Ezzo, J. A. and W. L. Deaver 1998 Watering the Desert: Late Archaic Farming at the Costello-King Site. Technical Series No. 68. Statistical Research, Inc., Tucson.
Huckell, L. W. 2006 Ancient Maize in the American Southwest: What does it Look Like and What Can it Tell Us? In Histories of Maize: Multidisciplinary Approaches to the Prehistory, Biogeography, Domestication, and Evolution of Maize, edited by J. E. Staller, R. H. Tykot and B. F. Benz, pp. 97-107. Elsevier/Academic Press, Amsterdam.
Mabry, J. B. (editor) 2008 Las Capas: Early Irrigation and Sedentism in a Southwestern Floodplain. Anthropological Papers No. 28. Center for Desert Archaeology, Tucson.