Some of the principal sites were astronomically determined by Commanders Ahmed Musallam and Nasir Ahmed, of the Egyptian navy. The task of mapping and planning was committed to the two young Staff-lieutenants sent for that purpose. They worked well in the field; and their sketches were carefully executed whilst under my superintendence. But it was different when they returned to Cairo. The maps sent to the little Exposition at the Hippo-drome (see conclusion) were simply a disgrace to the Staff-bureau. My departure from Egypt caused delay; and, when the chart reached me, it was far from satisfactory: names had been omitted, and without my presence it could not have been printed. With the able assistance of Mr. William J. Turner, of the Royal Geographical Society, who found the work harder than he expected, it has been reduced to tolerable shape. Still, it is purely provisional; and, when mining operations shall begin, a far more careful survey will be required. As regards archaeology, the second Expedition visited, described, and surveyed eighteen ruins of cities and towns, some of considerable extent, in North Midian, besides seeing or hearing of some twenty large Mashghal, apparently the ateliers of vagrant Gypsy-like gangs. This total of thirty-eight is not far short of the forty traditional Midianite settlements preserved by the mediaeval Arab geographers. Many others are reported to exist in the central or inland region; and fifteen were added by the South Country, including the classical temple or shrine, found upon the bank of the Wady Hamz before mentioned. The most interesting sites were recommended to M. Lacaze, whose portfolio was soon filled with about two hundred illustrations, in oil and water-colours, pencil croquis and "sun-pictures." All, except the six coloured illustrations which adorn this volume, have been left in Egypt. His Highness resolved to embody the results of our joint labours in a large album, illustrated with coloured lithographs, maps, and plans, explained by letter-press, and prepared at the Citadel, Cairo. The Meteorological Journal was kept by myself, assisted at times by Mr. Clarke. Mr. David Duguid, engineer of the Mukhbir, whose gallant conduct will be recorded (Chap. VIII.), and Commander Nasir Ahmed, of the Sinnar, obliged me by registering simultaneous observations at sea-level. The whole was reduced to shape by Mr. W. J. Turner, of the Royal Geographical Society.