APPENDIX. 



501 



when he could have taken the short and safe direct route 

 up the mid-length of his own lake — via Uniasai and Usoga, 

 by which an Arab caravan had travelled. 



The Ukara Lake will be found laid down (a.d. 1712) in 

 the Africa of John Senex, F.R.S. (quoted by the late Mr 

 John Hogg, F.R.S., 'On some old maps of Africa, in 

 which the central equatorial lakes are laid down nearly in 

 their true positions It is evidently the Garava of Merca- 

 tor (a.d. 1623), whose atlas supplies it with a northern ef- 

 fluent draining to the Nile. The ' Couir ' of D'Anville's 

 folio atlas (a.d. 1749), and placed where the Lake No arid 

 the Bahr el Ghazal actually exist, may be a confusion with 

 the equatorial Lake Kura Kawar, given by J a'afar Mo- 

 hammed bin Musa el Khwarazmi (a.d. 833) in the Rasm 

 el Arzi, published in Lelawel's Geographie du Moyen 

 Age (Brussels, 1850), and, like Garava, both may be de- 

 rived from Ukara. 



The third water is evidently the Nyanza of which I 

 first heard at Kazan of Unyamwezi, whence Captain Speke 

 was despatched on a reconnoitre between July 29 and 

 August 25, 1858. After returning, he reported that this 

 lake being nearly flush with the surface of the level country 

 to the south, bears signs of overflowing for some 13 miles 

 during the rains. The second expedition found no traces 

 of flood on the marshy lands to the North and the 1ST. West 

 of the so-called ' Victoria JSyanza.' This fact, combined 

 with a difference of level amounting to 400 feet in the 

 surface of the two waters, speaks for itself. We are justi- 

 fied in suspecting a fourth lake, or broadening of a river 

 along whose banks Captain Speke and Grant travelled 

 northward to Uganda, and there must be more than one, if 

 all his effluents be correctly laid down. 



