At the same time (1949-51) Oates carried out much comprehensive archaeological survey in the area over some 300 square kilometres around Gas red-Daun at the eastern part of the Tarhuna Plateau. By three seasons of work, he revealed a distribution of more than 100 sites, which chronologically extended from the first century to the fifth century AD (Oates 1953). During the mid-nineteenth century, the first century BCE pottery was little-known. However, the Oates’ sites consist for the most part of varying size of farms associated with their water control and supply works, which represent the key to their regional specialization.