This analysis adduces 72 Caddo bottles from 19 sites to test the hypothesis of distinct bottle morphologies associated with sites north and south of the shape boundary from within the spatial extent of the preceding Fourche Maline and Mossy Grove culture areas. The analysis was followed by additional tests to identify whether a difference in Formative/Early and Late/Historic Caddo bottle shapes occurs between and among the northern and southern Caddo groups in the southern Caddo area. Other tests include whether bottle shape varies with size, whether the null hypothesis of parallel slopes for Formative/Early and Late/Historic Caddo bottles is supported or rejected, and whether any group displays greater shape or size variation among individuals relative to other groups.
I extend my gratitude to the Caddo Nation of Oklahoma, the Material Sciences Laboratory at Southern Methodist University, the Williamson Museum at Northwestern State University, the Louisiana State Exhibit Museum, the Texas Archeological Research Laboratory at The University of Texas at Austin, and the Louisiana State University Museum of Natural Science for the requisite permissions, access, and space needed to generate 3D scans of Caddo bottles. Thanks also to Dean C. Adams, Emma Sherratt, Michael J. Shott, Hiram F. (Pete) Gregory, B. Sunday Eiselt, Julian A. Sitters, and Kersten Bergstrom for their constructive criticisms, comments, and suggestions throughout the development of this research design; to the editors for their invitation to submit this chapter; and the anonymous reviewers whose comments improved the manuscript. Development of the analytical work flow and production of 3D scans from the Clarence H. Webb collection was funded by a grant to RZS (P14AP00138) from the National Center for Preservation Technology and Training. Production of 3D scan data for Hickory Engraved and Smithport Plain bottles from the Texas Archeological Research Laboratory was funded by a grant from the Texas Archeological Society, and the production of 3D scan data for previously repatriated Caddo bottles was funded by a grant from the Caddo Nation of Oklahoma.