_17th March._ We set out at daylight and approached the high mountains of Shigre, which we had had in view the whole of the preceding day. After two hours march, we entered among these mountains, and then turning east, came to a fine Wady full of Doum trees, and bordered on either side by steep, and almost inaccessible cliffs. In following the windings of the valley, we arrived, after four hours march, near the water of Shigre, (شِقر) where we encamped. The surrounding mountains are all of granite, and consist of blocks of various sizes, heaped upon one another in the wildest disorder. Near the opening of the mountain, where the water is found, at some distance below the highest summit, I found the rock to be porphyry of a light reddish colour, close grained, with small veins of feldspath, much resembling the porphyry I saw last year, in Wady Lamoule, beyond the Second Cataract of the Nile. The approach to the spring is somewhat difficult, being at the extremity of a very narrow passage, in a cavern or cleft of the rock, where, besides the spring, there is also a collection of rain water. The water is excellent, and very cool, but unfortunately not very copious; at least, we found only a small supply. Some pigeons were flying about the spring. The well of Shigre is famous throughout this desert. The Bisharein frequently encamp in the neighbouring Wadys, and one of their principal Shikhs or Saints is buried near the well. Travellers often make pious offerings at the tomb, and if any Bedouins happen to be encamped in the neighbourhood, some sheep are purchased from them, and killed in honour of the Saint. One of our party found behind a rock, near the tomb, an empty chest, of Egyptian workmanship, quite new, which had probably been deposited there by some trader, whose camel could not carry it further, and who expected to take it up again on his return. The Ababde guides claimed it of the person who found it, alleging that they are the masters of the desert, and that all treasures found in it belong to them. We encamped at about half a mile from the well, and our first care was to fill our water skins. The Ababde kindly permitted the Fellah traders to fill their skins first, but the latter abused the permission, by watering likewise their camels; so that after they had retired from the well, very little water was left in it. The Ababde then declared that they should be obliged to stop here until the well should fill again. We remained therefore the whole night, the Ababde sleeping at the mouth of the cavern, to prevent any body from stealing water during the night.