[Footnote 51: _Op. cit._ Golénischeff gives sketch plans of the stations.] [Footnote 52: _The Empire of the Ptolemies._ London, 1895. p. 130.] [Footnote 53: DIODORUS (I. 49) probably greatly exaggerated the value of the produce of the mines. _See_ UHLEMANN, _Handbuch der gesammten aegyptischen Alterthumskunde_, Zweiter Theil, Leipzig, 1857, pp. 148-151, where a very clear account, mainly derived from Diodorus, is given of the mining methods used by the ancients.] [Footnote 54: _Bulletin Soc. Khéd. de Géogr._ 1886. p. 443.] [Footnote 55: According to Mr. Bramly (The Anglo-Egyptian Sudan. 1905. p. 91) the Bisharin are not true Arabs, and are of Hamitic descent.] [Footnote 56: Regarding the geographical boundaries of the different tribes, _see_ Chapter XII.] [Footnote 57: Schweinfurth did not have the same experience in 1864; but one speaks as one finds. Schweinfurth was reluctant to pass judgment, not knowing the language, and possibly in the interval since 1864 the people have improved.] [Footnote 58: On the Bishari language, _see_ ALMKVIST, _Die Bishari-sprache_, Upsala, 1881-1885; REINISCH, _Die Bedauye-sprache in Nordost-Africa_, Wien, 1893; and REINISCH, _Wörterbuch der Bedauye-sprache_, Wien, 1895.] [Footnote 59: The millieme is practically equivalent to an English farthing.] [Footnote 60: For a detailed description of this road, _see_ Chapter XIII.] [Footnote 61: Arrêté of the Ministry of Interior, Egypt, June 25, 1902.] CHAPTER III. * * * * * =SURVEYING METHODS AND PRINCIPAL GEOGRAPHICAL RESULTS.= * * * * * =Triangulation.=