In September, 1958, under terms of a co-operative agreement between The University of Texas and the National Park Service, a crew of the Texas Archeological Salvage Project returned to Harroun to complete the investigation of the site. Because of time limitations it was apparent that all three of the remaining mounds (B, C, and D) could not be entirely excavated. Therefore, it was decided to concentrate on Mound C since it appeared superficially to be the least disturbed of the three. After excavation of Mound C was well under way, a portion of the crew was moved to Mound B and it was also opened. Both mounds were found to contain burned remains of house structures. [Illustration: Fig. 1 HARROUN SITE 41 UR 10 PLAN OF SITE solid lines mark measured locations dashed lines mark approximate locations] LOW MARSHY AREA FENCE MOUND C BORROW PIT LAKE high water drainage channel MOUND B CYPRESS CREEK MOUND A MOUND D Investigation of Mound D was begun late in September a few days before the termination of the dig. Time did not permit complete excavation of Mound D that season, but it was tested sufficiently to reveal that it—like Mounds B and C—contained the burned remains of at least one house. During the 1958 season, in addition to the work at Mounds B, C, and D, several trenches and test pits were dug in the floodplain near the mounds in a fruitless search for additional occupational features. A final trip was made to the site in February, 1959, by L. F. Duffield, W. A. Davis, and E. Mott Davis of the Texas Archeological Salvage Project. They spent three days exposing and recording the portion of the house at Mound D which had been left unexcavated the previous fall. As a result of the investigations at the Harroun Site in 1957, 1958, and 1959, all four of the mounds were completely excavated except for certain marginal portions and several check blocks. In addition, the area surrounding the mounds was tested sufficiently to show that there was no general area of occupation near the mounds. The excavation of the Harroun Site was supervised by the senior author. The junior author served as an assistant archeologist during both the 1957 and 1958 seasons. The artifacts recovered indicate affiliation with the Fulton Aspect of the Caddoan Area (Suhm _et al._, 1954: 151-161). The Fulton Aspect is the later of two aspects that have been recognized in the Caddoan Area as belonging to the agricultural, ceramic Mississippi culture pattern of the Southeastern United States.