Five cupules and four cob fragments were recovered from hearth Feature 19, near the bottom of Unit II (Ezzo and Deaver 1998:23, 57, Table 3). This date is on one of the cob fragments.
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.
Mabry, J. B. (editor) 2008 Las Capas: Early Irrigation and Sedentism in a Southwestern Floodplain. Anthropological Papers No. 28. Center for Desert Archaeology, Tucson.