179 
Notes 07 i the Co 7 igo River . 
to the southward of the Line, swelling the tributary 
streams and pouring in mountain torrents the 
waters into the main channel, the rise would have 
been sudden and impetuous.” Of course the writer 
had recourse to the “ Lakes of Wangara,” in north 
latitude 12° to 15° : that solution of the difficulty 
belonged inevitably to his day. Captain Tuckey 
(p. 178) learned, at Mavunda, that ten days of 
canoeing would take him beyond all the rapids to 
a large sandy islet which makes two channels, one 
to the north-west, the other to the north-east. In 
the latter there is a fall above which canoes are 
procurable: twenty days higher up the river issues, 
by many small streams, from a great marsh or lake 
of mud. 1 Again, a private letter written from the 
“ Yellala” (p. 343) declares that “ the Zaire would 
be found to issue from a lake or a chain of lakes 
considerably to the north of the Line ; and, so far 
from the low state of the river in July and 
August militating against the hypothesis, it gives 
additional weight, provided the river swell in 
early September”—which it did. In his “ Journal ” 
(p. 224), we find a memorandum, written as it were 
with a dying hand, “ Hypothesis confirmed. The 
water ...” 
On February 24, 1854, Dr. Livingstone, after 
leaving what he calls the “ Dilolo Lake,” found on 
1 Of this lake I shall have something to say in chap. xii. 
