‘On the Nile and its Tributaries,’ a statement of his then novel views (Oct. 28, 1846, and printed in the Journal Royal Geographical Society, vols, xvii., xviii. of 1847-8). ‘The Sources of the Nile: being a General Survey of the Basin of that River, and of its Head-streams, with the History of Nilotic Discovery’ (London, Madden, 1860). The appendix contains a summary of Dr Bialloblotsky’s projected journey. ‘On the Mountains forming the eastern side of the Basin of the Nile, and the origin of the designation, “Mountains of the Moon,” applied to them.’ This paper, being refused by the Royal Geographical Society, was read (August 30, 1861) before the British Association at Manchester. ‘Who discovered the Sources of the Nile?’ A letter to Sir Roderick I. Murchison (Madden, Leadenhall-street, 1863). ‘On the Lake Kurá of Arabian Geographers and Cartographers.’ This paper argues that the equatorial Lake Kura-Kawar, drawn by an Arab, and published in Lelewel’s “Geographie du Moyen Age,” represents the lakes and marshes of N. lat. 9°. Dr Beke, it appears, doubly deserves the title ‘Theoretical Discoverer of the Nile Sources.’ He has lately transferred the Caput from S. lat. 2°-3° to S. lat. 10° 30′-11°, and from E. long. 34° to E. long. 18°-19°, making the stream pass through 43° of latitude, and measuring diagonally one-eighth of the circumference of the globe. (‘Solution of the Nile Problem,’ Athenæum, Feb. 5, 1870). The Nile is thus identified with the Kasai, or Kassavi, the Casais of P. J. Baptista (the Pombeiro), the Casati of Douville, the Casasi of M. Cooley, the Cassabe of M. J. R. Graça, the Kasaby of Mr Macqueen, and the Kasye or Loke of Dr Livingstone. These ‘New Sources’ are in the ‘primæval forests of Olo- Vihenda and Djikoe or Kibokoe (the Quiboque of the Hungarian officer Ladislaus Magyar), in the Mossamba Mountains, about 300 miles from the coast of Benguela. Mr Keith Johnston, jun. believes that the Lufira- Luapula river is the lower course of the Kassavi or Kassabi, which is usually made to rise in S. lat. 12°, near the Atlantic seaboard, and after flowing N. E. and N. as far as about S. lat. 8°, to turn eastward instead of continuing to the N. W. and W. He makes it, however, the true head of the Congo, not of the Nile.