Beyond the chapel of the saint the country became more hilly, and after some time we entered a ravine joining the Wady Gedaera, which exhibited the remains of three broad and firmly constructed dykes, crossing the ravine at the distance of about eight hundred yards from each other. They were built of small stones, and were evidently intended to exclude the water from the lower part of the valley. Another eight hundred yards below the innermost dyke, the ravine widens out into a fine verdant hollow, stretching from west to east, and provided with several wells. On a detached hill rising in the midst of this basin, is situated the Kasr Dawán, built partly of older materials of hewn stone, partly of small stones, and probably of the same age as the dykes. The whole floor of the basin is strewn with ruins; and a considerable village seems to have extended round the castle: where the ground was free from stones, it was covered with ranunculuses. Altogether, this spot was interesting—the stronghold of a chieftain who appears to have had energy and foresight, but whose deeds are left without a record. As soon as we emerged from this ravine the whole character of the country changed, and through a pleasant valley we entered a wider plain, bordered in the distance by a high range of mountains, among which the Jebel Msíd, crowned with a zawíya or convent, is distinguished by its height and its form. The fine pasturage which this plain affords to the cows of the Mehaedi enabled their masters to regale us with fine fresh sourmilk, which interrupted our march very pleasantly. On the site of an ancient village, near the margin of a small torrent, I found the above curious specimens of upright pilasters, together with the impost, remarkable for their height as well as for the rough sculpture of a dog, or some other animal, which is seen on the higher part of one of them. About seven hundred yards beyond the torrent called Ksaea, we had on our right a large building of hewn stone about 140 yards square, besides six pairs of pilasters together with their imposts; but some of them are lying at present on the ground. These structures could never have been intended as doors or passages; for the space between the upright stones is so narrow, that a man of ordinary size could hardly squeeze his way through them. Other ruins are on the left.