THE fortified palace of Ukhaiḍir stands in the desert about three hours’ journey to the south-east of the oasis of Shethâthâ and some seven hours’ south-west of Kerbelâ. Its exact site has been fixed by Sir William Willcocks’s survey and it is upon his map that mine is based (Map 1). Ukhaiḍir is not far from the south-west end of the low ground which Sir William Willcocks has called the Ḥabbâniyyeh depression. The southern part of this depression covers an area of 146 square kilometres at a level of 46 metres above the Persian Gulf;[9] at its lower end it still contains a lake of brackish water, the lake of Abû Dibs, the water-level of which is 19 metres above the Persian Gulf. The northern part is occupied by the Ḥabbâniyyeh Lake. That the whole area was once filled with escape water from the Euphrates is shown by the fact that it is covered at a level of 25 metres above the Persian Gulf by a thick belt of Euphrates shells; at this level it extends over an area of 1,200 square kilometres. The oases of Raḥḥâliyyeh and Shethâthâ are situated upon the edge of this ancient reservoir. Between Shethâthâ and Ukhaiḍir a shallow valley, the Wâdi al-Ubaiḍ, makes its way up from the south-west to the lake of Abû Dibs. I have been told that after heavy winter rain a stream has been known to flow down the ghadîr, the water-course, which winds through the sand and stones of the valley bed. Whether this be true or no, a well of good sweet water exists in the Wâdi al-Ubaiḍ, fed, in all probability, by a spring, like the famous water of Muḥaiwir in the Wâdi Ḥaurân, or the wells of ‘Asîleh in the Wâdi Burdân. At no other point in the immediate vicinity of Ukhaiḍir is fresh water to be obtained; whether you dig within the palace walls, or without, the water, if water there be, is brackish and unfit to drink. To the north of the Wâdi al-Ubaiḍ the ground opposite Ukhaiḍir, sloping gradually down to the Ḥabbâniyyeh depression, is intersected by gulleys, narrow and steep, cutting through hillocks of gypsum, and among these hillocks is the small ruin which the Arabs call Qṣair. Here, I take it, the gypsum was obtained for the mortar which binds the masonry of the palace, and its good qualities are attested by the excellent preservation of wall and vault until this day. I have not visited the quarries, but the Arabs told me that the stone had been brought from a distance of about an hour to the south of Ukhaiḍir, where there are traces of working ‘taḥt al-arḍ’, below the ground--not in a hill-side. Near the quarries there is said to be a well of good but not abundant water; Shakhârîz is the name of the well. It is built of stone. Behind it, some three hours’ journey from Ukhaiḍir, there is a low line of hills, the Djebel Ḍaba’. From the castle walls the long levels of the desert spread out invitingly to the hills, and I would gladly have gone thither, but I had not time to spare during either of my visits. Ukhaiḍir does not reckon security among its many charms.