As an initial test, most of the southwestern quadrant of the mound was excavated to undisturbed sub-mound soil so that two radial profiles were left standing, one running south, the other west, from the approximate center of the mound. Since time did not permit complete excavation of Mound A, the only squares excavated in the remaining three quadrants were the three 5-foot squares cornering on the approximate center point of the mound and square N10-E5 which was excavated in order to expose Burial No. 1 (Fig. 2). Two additional 5-foot squares (N15-W40 and S25-E0) beyond the limits of the mound structure were carried down several feet below the surface of the floodplain. Each of the latter squares was aligned with one of the two major profiles radiating from the center of the mound. A 1-foot wide check strip, running east-west along the N20 line, was left standing. All squares were dug in 0.5-foot levels. Those squares in the mound structure were leveled successively on each ½-foot interval of the vertical reference system, while the two squares dug into the floodplain near Mound A were dug by 0.5-foot levels measured from the surface of the ground. All the soil from squares N15-W40 and S25-E0, and an estimated 50% of the excavated mound fill from other squares, was screened through hardware cloth of ¼-inch mesh. All digging was done with shovels except for close work around Feature No. 1 and Burial No. 1 where trowels were used. In the mound, horizontal plans were drawn to scale at 0.5-foot intervals as the squares were leveled, all features, soil changes, and major disturbances being recorded. Representative profiles were also drawn to scale so as to provide a record of the mound structure and of the relationship of the mound to the floodplain on which it rested. The major profiles, the burned area near the center of the mound (Feature No. 1), and the sub-mound burial (Burial No. 1) were photographed in both color and black and white. [Illustration: Fig. 2 HARROUN SITE 41 UR 10 MOUND A contour interval = 0.5 feet shading indicates excavated area] STRUCTURE OF MOUND A The profiles revealed that the bulk of the mound fill comprised a single structural member composed of dark gray, humus stained, sandy, midden soil (Fig. 3). It reached a maximum height of 1.4 feet above the surface of the surrounding floodplain and extended down to an average depth of 1.4 feet below the floodplain surface. The fill of Mound A contained many tiny fragments of mussel shell, bone, charcoal, and stone chips, as well as a few potsherds, projectile points, and other artifacts. Some of the shell and bone fragments showed evidence of burning. The mound fill was unquestionably derived from an occupational area containing an appreciable quantity of cultural detritus.