MR. philby has described the pools of al-Kharj, near Riyadh in central Arabia, including the 'Ain al Dhila' and 'Ain Mukhisa. These two pools are close to the slope leading upwards to the Qusai'a downs, which, as Mr. Philby points out, here bulge westwards. There is an extensive flat-topped hill, which is part of the downs, jutting out towards Dilam and Sulaimiya. From it Yamama, former capital of a great Kingdom, is easily visible, a little to the east of Sulaimiya. In the 'Heart of Arabia' Mr. Philby does not mention the many mounds, or graves, on the ridge near the great pools of Kharj, therefore it seems worth drawing attention to them. On the summit of this flat-topped hill above 'Ain al Dhila' there are many mounds of rather large stones, each mound is about 6 feet across and 4 feet 6 inches high. The graves, if such they are, were here dotted along the edge of the hill, and many of them were visible from the plain below. A little farther westwards, on the slopes above Umm Mukhisa the mounds were more numerous and extended down the slope, which is gentle on that side. Con? tinuing round the edge of the hill, in the direction of Dilam, the mounds are not quite so frequent and are nearly all on the very edge of the plateau-like hill. Occasionally there were little collections of twenty or so mounds, but these were on the top of the hill. Among these groups I noticed two other types of mound. One was round, but considerably higher with larger stones and a flat earth-covered top. The average height of these graves was also 6 feet. The other, or third, type was 12 yards long, ran roughly north and south, and had an erect stone at the southern end in one case and at the northern end in the others. These long mounds or walls were only about 3 feet 6 inches high. The most numerous type, the ordinary round mounds of stones, continued along and near the edge of the hill right round to the southern side. The eastern side was the only part of the edge where there were no mounds. Here the hill joins with the main Qusai'a downs, from which it is almost separated by a wadi rising near its northern edge which runs first southwards and then, when clear of the plateau, westwards. All the mounds, except a few on the southern edge, have a view to Sulaimiya. The hill-top is perhaps 2 miles from north to south and 1 x2 miles from east to west. The number of mounds of the first type is perhaps 1500, and of the second type only a very few, perhaps under fifteen. There were even fewer of the third type, I saw only three; they were however close to the others and had every appearance of being part of the cemetery. All the stones were unhewn: on the higher mounds a little more trouble seemed to have been taken as the stones were better