The total cost of the field-work was approximately L.E. 5,090, or about 150 milliemes for each square kilometre of country mapped in detail. Nearly two-thirds of the entire amount were expended in camel-transport, the remainder representing the expenditure on salaries and allowances of the author and assistants engaged in actual surveying operations. * * * * * [Footnote 1: The references in parentheses after place-names refer to their positions on the map, Plate I.] [Footnote 2: _Bruce’s Travels to discover the Sources of the Nile._ Halifax, 1845. pp. 78-80.] [Footnote 3: CAILLIAUD, _Travels in the Oasis of Thebes and in the Deserts east and west of the Thebaid_, edited by JOMARD. Translated from the French. London, 1822. This work contains two small maps and many engravings. (The map of the Eastern Desert is unfortunately wanting in the Khedivial Library copy, which is the only one I have seen.)] [Footnote 4: BELZONI, _Narrative of the Operations and Discoveries in Egypt and Nubia, and of a Journey to the Coast of the Red Sea, in search of the ancient Berenice_. London, 1820.] [Footnote 5: _Plates illustrative of the Researches and Operations of G. Belzoni in Egypt and Nubia._ London, 1822. (This is a large folio atlas of 44 plates.)] [Footnote 6: LINANT DE BELLEFONDS, _L’Etbaye_, Paris (N. D., but the title of the map accompanying the work gives the date as 1854).] [Footnote 7: WILKINSON, _Topography of Thebes and General View of Egypt_. London, 1835. pp. 415-422. _Modern Egypt and Thebes._ London, 1843. Vol. 2, pp. 389-394.] [Footnote 8: WELLSTED, _Notice of the Ruins of Berenice_. Journal of the Royal Geographical Society. London, 1836. pp. 96-100.] [Footnote 9: _Red Sea and Gulf of Aden Pilot._ 5th edition. London, 1900 (with several later supplements). _Admiralty Charts of the Red Sea._ Sheets 2 and 3.] [Footnote 10: At Halaib Fort the difference is as much as 1′ 53″, or nearly 2 miles; _see_ p. 66.] [Footnote 11: This should not be confounded with the higher Gebel Faraid to the northward.] [Footnote 12: Qash Amir is quite a separate mountain from Gebel Elba, not part of the same range as the chart indicates.] [Footnote 13: BARTH, _Reise von Assuan über Berenike nach Kosser_—Zeits. für allgem. Erdkunde. Berlin. Vol. VII (1859), pp. 1-31. (There is no map to this work, but the route followed is easily traceable on a modern map owing to the place-names being given in the journal.)] [Footnote 14: V. HEUGLIN, _Reise in Nordost Africa und längs des Rothen Meeres im Jahre 1857_. Petermann’s geogr. Mittheilungen, 1860. pp. 332-335. (This paper is accompanied by a map, which is, however, lacking in the copy of the Khedivial Library).] [Footnote 15: This I think is an error. A small isolated granite hill west of Berenice is called Sikeit, and has been visited by Barth and myself; but it is devoid of ruins. My Arabs called Berenice _Medinet el Haras_.]