Having returned to our encampment, I and my companion resolved to separate for a few days, Overweg wishing to examine the neighbourhood of the ʿAin Shershára for geological purposes, while I was rather bent upon executing the original plan of our route all round the mountain-range. We agreed to meet again at the castle called Kasr el Jefára in the plain near the sea-shore. We borrowed another tent from the governor for Mr. Overweg during his stay at this place, while I procured a horseman, with whom, together with Ibrahím, our shoush, and one of the camel-drivers, I was ready for starting an hour before noon; for the heat of the sun was not much to be dreaded at this season of the year. Overweg accompanied me as far as Kasr Dóga. Winding along narrow ravines, after about one mile’s march we passed, on an eminence to our right, another specimen of large pilasters with an impost, and ruins of buildings of large square stones close by. After much winding, we cleared the narrow channel ascending the hills, which were covered with halfa; but here too there was not a single tree to be seen, and my guide said that there were no olive-trees in the Tarhóna except in Máta, a place situated between Mount Bu-tauwíl and Kasr Jefára, from which the tribe Máta derives its name. I have noticed before, as remarkable, the three olive-trees near Bu-tauwíl. It was about one o’clock in the afternoon when we came in sight of the Roman monument called Kasr Dóga; and its brown colour almost induced us to conclude that it was of brick; but on approaching nearer, we found that it was built of hewn stone. We were astonished at the grand dimensions of the monument, as it appeared evident that it was originally a mere sepulchre, though in after times blocked up by the Arabs, and converted into a castle. [Illustration]