Salvage excavations on the verges of the A344 at Stonehenge resulted in the recovery of large, well stratified groups of prehistoric artefacts. In 1968, a complete section across the Avenue earthwork was recorded, and material obtained for a radiocarbon determination. In 1979 and 1980, the two ditches of the Avenue were again sectioned. Detailed recording of find provenances from both these and the Heelstone ditches permitted a fuller understanding of the erosion and filling processes. In 1979, part of a pit that had held a previously unknown standing stone was excavated. A geophysical survey of the Avenue suggests that further pits may be present along its course. A unique deposit of prehistoric stoneworking debitage was sectioned in 1980. It is suggested that this debitage, representing the opportunistic use of megalith shaping debris, accumulated within a structure inhabited at the time the major stone monument was being erected. The discovery of these rock fragments has prompted an important new study of the petrology at Stonehenge, and a discussion of stoneworking around the site is included. The paper concludes with an appraisal of the chronology of Stonehenge and an introduction to the comprehensive excavation archive.