290 The Yellala of the Congo. 
Sangallas. The southern feature, double like the 
Yellala, shows an upper and a lower break, sepa¬ 
rated by two miles, the rapids being formed as 
usual by sunken ledges of rock. Two days’ 
paddling lead to the northern or highest Sangalla, 
which obstructs the stream for 22 miles : Tuckey 
(p. 184) makes his Songo Sangalla contain three 
rapids ; Prof. Smith, whose topography is painfully 
vague, doubles the number, at the same time he 
makes Sanga Jalala (p. 327) the “ uppermost fall 
but one and the highest.” Finally, at Nsundi (on 
the map Soondy N’sanga), which was reached on 
Sept. 9, a picturesque sandy cove at the opening of a 
creek behind a long projecting point, begins a lake¬ 
like river, three miles broad, with fine open country 
on both banks: the explorer describes it as 
“ beautiful scenery equal to anything on the banks 
of the Thames.” 
Here the Nzadi is bounded by low limestone 
hills already showing the alluvial basin of Central 
Africa ; and the land is well populated, because cal¬ 
careous districts are fertile in the tropics and pro¬ 
visions are plentiful. Prof. Smith (p. 336) was “so 
much enraptured with the improved appearance of 
the country and the magnificence of the river, that 
it was with the greatest difficulty he was prevailed 
on to return.” Of course, the coaster middle-men 
report the people to be cannibals. 
From the Vivi Rapids to Nsundi along the 
