[19]Op. cit. p. CXXXVI.
[20]See Schweinfurth in “Pet. Mitt.” 1876, p. 265; also Ascherson in “Zeitschrift d. Gesellschaft für Erdkunde” zu Berlin, 1885, p. 115.
[21]Beadnell, Découvertes Géologiques Récentes dans la Vallée du Nil et le Désert Libyen, compte rendu, VIIIe Congrès Géologique international, 1900; Paris 1901, p. 847.
(Recent Geological Discoveries in the Nile Valley and Libyan Desert, London, 1900.)
[22]For a brief description of these deposits see Découvertes Géologiques, etc., pp. 863-865.
[23]Geolog. Mag. Jan. 1900, No. 427, p. 18, and op. cit. (Découvertes géologiques), p. 847.
[24]Ball. Kharga Oasis, p. 23, Cairo 1900.
These gravels were examined and mapped in the Survey of the Nile Valley in 1896. (H. J. L. B.)
[25]Jordan’s position for this point is approximately lat. 27° 46′ 20″ N., long. 28° 36′ 20″ E. of Greenwich, altitude 193 metres above sea-level.
[26]Voyage à Méroé, etc., vol. 1, p. 196.