This section of North Midian may be described as essentially a mining country, which, strange to say of a province so near Egypt, has been little worked by the Ancients. The first Khedivial Expedition brought back specimens of free gold found in basalt, apparently eruptive, and in corundophyllite, which the engineer called greenstone porphyry: silver appeared in the red sands, in the chloritic quartz, and in the titaniferous iron of the Jebel el-Abayz; the value being 265 to 300 francs per ton, with traces in the scoriæ. The second Expedition failed to find gold, but brought back argentiferous galena in copper-stained quartz, and possibly in the ochraceous red veins seaming the Secondary gypsum; with silicates and carbonates of copper: select specimens of the latter yielding the enormous proportion of forty per cent. In this northern region the great focus of metallic deposit appears to lie between north lat. 28° 40' and 27° 50'; that is, from the Jebel Tayyib Ism, north of Makná, to the southern basin which contains the Jebel el-Abyaz or "White Mountain." Its characteristics are the argentiferous and cupriferous ores, whereas in South Midian gold and silver were worked; and the parallelogram whose limits are assigned above, might be converted into a Northern Grant. Concerning the immense abundance of gypsum, and the sulphur which is suspected to be diffused throughout the Secondary formation, ample details have been given in the preceding pages. The principal ruins of ancient settlements, and the ateliers, all of them showing vestiges of metal-working, numbered eight: these are, beginning from the south, Tiryam, Sharmá, ‘Aynúnah, the Jebel el-Abyaz, Magháir Shu'ayb, Makná', Tayyib Ism, and El-‘Akabah. Magháir Shu'ayb, the Madiáma of Ptolemy, is evidently the ancient capital of the district. It was the only place which supplied Midianitish (Nabathæan) coins. Moreover, it yielded graffiti from the catacombs; fragments of bronze which it will be interesting to compare by assay with the metal of the European prehistoric age; and, finally, stone implements, worked as well as rude. I will end with a few words concerning the future industry of North Midian. For the success of these mines the greatest economy will be necessary. The poorest ore can be treated on the spot by crushing and washing, where no expenditure of fuel is required. The richer stone, that wants roasting and smelting, would be shipped, when worth the while, from North Midian to Suez: there coal is abundant, and the deserted premises of Dussaud-Bey, belonging to the Egyptian Government, would form an excellent site for a great usine centrale. Finally, the richest specimens--especially those containing, as many do, a medley of metals--would be treated with the least expenditure, and the greatest advantage, at Swansea or in other parts of England, where there are large establishments which make such work their specialty.