to notice that Qash Amir (_Os_), (the “Scragged Hill” of the Admiralty Chart), is in its turn quite distinct from Elba, Halaib is called Elei,[19] and the Geziret Halaib is shown as a peninsula; Kwolala is called “Geziret Elei,” and the Geziret el Dibia (the Elba Island of the charts) is called Geziret Abu Fendira by Schweinfurth. My Wadi Shellal he calls “Wadi Heberah,” and Cape Elba (my Ras Hadarba) is noted as “Ras Edineb.” His “highest peak” (South Peak of the charts) is Asotriba, the highest mountain of the group, lying just within the Sudan; the name Asotriba (Schweinfurth’s “Soturba”) means “green mountain,” and refers to the vegetation on its slopes. Schweinfurth’s experience of the Bisharin led him to give them a very bad character, though he gives high recognition to their beauty of feature and figure; but being unfamiliar with their language was, he admits, an obstacle to forming a fair judgment of them. In 1873, Colonels PURDY and COLSTON, two American officers attached to the Egyptian Army, were commissioned by the Khedive Ismail Pasha to carry out a reconnaissance for a proposed railway line between Berenice and Berber. Colston[20] travelled overland from Qena _via_ Qoseir to Berenice, discovering several ancient stations on his way to join Purdy. Though Purdy sanguinely states[21] that “la construction d’un chemin de fer de ce point (Berenice) à Berber n’offrirait pas de grandes difficultés,” the reconnaissance appears to have been singularly rough for a decision in so weighty a matter. Distances were mere guesses, and the only instruments employed seem to have been a compass, aneroid, and hypsometer. The compass must often have been unreliable owing to magnetic rocks, which in places deflect the needle as much as 40° from its normal position, while the use of the aneroid was so little understood that Purdy could actually write, in the concluding paragraph of his paper: “Je me permets de rappeler l’attention sur les notes barométriques jointes à ce rapport. A ce propos, je dois faire observer que quoique l’anéroïde soit très sensible aux changements de niveau, il ne l’est pas assez pour la pression atmosphérique, et sa marche est excessivement irrégulière. . . . Il m’est arrivé, par exemple, de constater, le matin, au moment du départ, une différence sensible du point marqué le soir précédent à mon arrivée.” Not only are many of the place-names given by Purdy erroneous, but some of his most important statements are contrary to fact; to take only a few examples, the Wadi Kalalat is confused with Wadi Shenshef, and Gebel Shut with Gebel Dahanib, while it is stated that no water exists between Gebel Dif (_Fm_) and Gebel Egat (_Ft_), although there are several good wells between the two places. The map accompanying Purdy’s paper is full of errors, and almost worse than useless. Of Colston’s route from Qena to Berenice there was no published cartographic record until 1891, when G. CORA[22]