Geophysical and topographical surveys were carried out over the long barrow at Tenantry Farm, Rockbourne, Hampshire (Monument No. 12096). Both magnetometer and earth resistance surveys successfully defined both the barrow ditches and the barrow mound. A possible internal structure was also revealed. The topographical survey showed that the barrow was still eroding ten years after the previous survey, and that the rate of erosion appeared to be steady. The topographical survey also provided firm geo-referencing for all the survey data.