We will now proceed to the central Jebel el-Kibri't; a superficial examination of which by the first Expedition[EN#145] proved that the upper rock yielded four, and the lower nine, per cent. of tolerably pure brimstone. The shortest cut from the dock-harbour lies up the southern Wady Ha'rr, with its strangely weathered sandstone rocks, soft modern grits that look worm-eaten. Amongst them is a ledge-like block with undermined base projecting from the left bank: both the upper and the lower parts are scattered over with Wasm, or Arab tribal marks. On our return from El-Wijh we found this sandstone tongue broken in two: the massive root remained in situ, but the terminal half had fallen on the ground. This was probably the work of an earthquake which we felt at Sharm Dumayghah on March 22nd.[EN#146] The track then strikes the modern Hajj-road, which runs west of and close to the Sulphur-hill; the line is a succession of watercourses,[EN#147] and in Wady Khirgah we found blocks of the hydrous silicate, corundophyllite which may be Serpentine: it is composed of a multitude of elements, especially pyrites. After an hour and a quarter's sharp walking, we hit the broad Wady el-Kibrít, which rounds its Jebel to the south-east, and which feeds the Wady el-Jibbah, itself a feeder of the Sharm Jibbah. The latter, which gave us shelter in the corvette Sinnár (Captain Ali Bey), is a long blue line of water bounding the western base of the Sulphur-hill. This central Tuwayyil el-Kibrít is an isolated knob, rising abruptly from Wady-ground; measuring some 240 feet in height, and about 880 metres in diameter, not including its tail of four vertebræ which sets off from north-west to south-east. Viewed from the north it is, as the Egyptian officers remarked, a regular Haram ("pyramid"), with a kidney-formed capping of precipitous rock. Drinkable water, like that of the Wady el-Ghál, is said to be found in the Wady el-Kibrít to the north-east; and the country is everywhere tolerably wooded. The Bedawin brought us small specimens of rock-crystal and fragments of Negro-quartz, apparently rich in metal, from a neighbouring "Maru." They placed it amongst the hill-masses to the east and south; and we afterwards found it for ourselves.[EN#148]