In order to place these two types of pottery we must examine their occurrence on the Georgia coast and in north Georgia. Such a study reveals that the simple stamping follows directly after fiber tempering on the coast; and that in north Georgia, where the latter is absent, it lies immediately above a fabric-marked pottery very similar to Dunlap. It would seem likely, then, that this latter type of pottery might have worked its way south by the end of the period in which fiber temper was in vogue. Both types exhibit a kind of finish which, like the early cordmarking farther north, resulted from techniques that had probably been found most effective in working the wet clay. Some sort of implement was needed for thinning and compacting the vessel walls, and experiment has shown that a paddle with roughened surface is more efficient for this purpose than a smooth one. No doubt this is caused by the more tenacious adherence of the wet clay to the latter. In any event, different ways were found of roughening a flattened stick or paddle, whether by wrapping various materials about it or carving it with deep grooves; and some groups may well have rolled up a piece from an old broken basket or bit of matting and found it equally useful. Then, if a smooth surface were desired, the marks of any of these implements could be erased easily by smoothing with a wet hand. [Illustration: Reconstructed pottery stamps. Designs taken from sherds excavated at the Swift Creek site. Total length of paddle, 9 inches.] [Illustration: Fragments of Swift Creek stamp designs. Scale about two-fifths.] The time we have been describing belongs to the general period of eastern United States archeology known as Early Woodland. The Adena culture, which apparently spread from centers in the Ohio Valley, belongs to this period and is well known for its elaborate burial mounds and other distinctive features which are regarded as typical markers over a wide area. While no burial mounds are known from middle Georgia at this time, the fabric-marked and simple-stamped pottery does belong to a general class of wares occurring also in Adena sites. It seems also to relate Ocmulgee to a pair of eagle effigy mounds of stone near Eatonton, Ga.; and bird symbolism is likewise a distinctive Adena feature, though one more fully developed in the following Middle Woodland stage. So it appears that a few traits have been found to connect this period quite definitely with some of the broader currents affecting other areas in the same time span.