In the Gebel Garian, about 20 kilometres south of Asabaa, the map-makers of 1964 indicated an ancient wall (Fig. 1) called Hadd Hajar (i.e. wall of stone) running south-west for six kilometres from Ras al Tays al Abyad (858 m; the Hill of the White Goat) on which stood a watch tower, to Ras al Said (764 m). The country crossed by Hadd Hajar is about 690-730 m above sea-level with a gently-undulating surface constituting a fairly open and level valley. The hills are covered with esparto-grass. On the west the Wadi Wamis winds among closely-set hills while, in the north-east, the wall is carried for a further three quarters of a kilometre across a narrow valley from Ras al Tays al Abyad to another hill Ras al Saqifah. An old track comes southwards down this valley flanked on the east side by a barrier of hills over 800 m high. Where the track crosses the wall there is a Roman building (Gasr al Saqifah) with traces of an archway for people and flocks to pass through. Two kilometres to the south is an old cistern (Majin Saqifah) presumably Roman. Beyond, the track continues about 25 kilometres to a large well, Bir al Shaqaykah (Sceghega), after which it is another 28 kilometres south-eastwards to Mizdah on the Wadi Sofeggin.