The Smithport Landing Site was initially explored by Monroe Dodd, Jr., and the author between 1934 and 1940.[1] It was the first site at which we found burials and whole pottery; it was also the first site in Louisiana which was identified as an Alto Focus component (Webb, 1948) and was recognized as such in the Davis Site report (Newell and Krieger, 1949: 195, 197, Fig. 62). In describing the Bossier Focus, Smithport Landing was one of 15 sites used for comparison and discussion of the relative incidence of Bossier Focus pottery types, and of several pottery complexes. First suggested in my 1948 paper, and elaborated in a more recent study (Webb, 1961) of 20 sites in northwestern Louisiana, is the thesis that the Bossier Focus developed out of a simultaneous spread of Alto and Coles Creek peoples or influences across this area in post-Marksville times. Smithport Landing was one of the key sites in this study, because of the admixture of Alto and Coles Creek pottery types and the presence of a minor Bossier Focus manifestation. It therefore seems appropriate to publish the available information about this site, despite the limited excavations conducted nearly 30 years ago. The criticism has been made that too many foci in the Caddoan area have been based on excavation of a single site and that the Alto Focus, for example, is based on the Davis Site alone. The information presented herein concerning Smithport Landing and other Alto Focus manifestations in Louisiana was available to, and used by, Krieger as indicated in the Davis report. The details should have been published for other students, however, especially since burials of the Alto period are limited in number. SITE ENVIRONMENT The Smithport Landing Site is in the eastern edge of De Soto Parish, about eight miles east of Mansfield, the Parish seat (Fig. 1). It is a relatively large village site situated on eroded and dissected hills which project in an expanded tongue of land fronting on Old Smithport or Clear Lake (Bayou Pierre Lake). The former lake bed is now dry in the summer, swampy during the rainy season. Buffalo Bayou courses through this low area to join the outflow of present Smithport Lake about one mile northeast of the site. Further eastward this drainage flows into Bayou Pierre which continues some 20 miles down the southwestern margin of the Red River flood plain until it empties into this river near Natchitoches.