Th& Kernel a direct line. . The convex of the how is distant
of the
Argument, from the water-parting which supplies its tributaries
from the north 330 geographical miles in a direct
line.
Of the southern tributaries flowing into the great
river the largest are the Kwa, Mohindu, Ikelemba,
Lulungu, and Lubiranzi.
By ascending the Kwa we obtain a navigable
length of 281 miles to the upper extremity of .Lake'
Leopold IL The Mbibe and Ngana branches will
add a further course of 220 , miles.
Two hundred and fifty miles above the Kwa. the
Lukanga is discovered, which leads us into Lake Man-
tumba, whose populous shores must not be neglected
by the future trader in the Upper Congo.
From the confluence of the Lukanga with the
Congo to the extremity of Lake Mantumba is seventy
miles.
Sixty miles above the Lukanga we arrive at the
fine river Mohindu, We,only explored it for about
eighty miles, but, considering its magnitude and the
native reports, we may estimate its navigability to be
about 650 miles.
About thirty miles higher up the Congo is the
Ikelemba, which I estimate will furnish 125 miles of
river course accessible to trade. It is the commercial
reserve of the Bakuti tribe.
The next river we arrive at is the Lulungu, which
will probably be found, with its tributaries, Lulua and
Lubi,. navigable for over 800 miles. Its banks are
reported to be more populous than those of the Congo. The Kernel
This river is exploited by the Bauranga and Bakumira Argument,
mostly.
The next river is the Lubiranzi, which is navigable
only for twenty-five miles, when it becomes
interrupted by rapids ; and, although they are very
slight, they are sufficient to impede the navigation.
Beginning at Stanley Pool to survey thé navigability
of the northern tributaries, the first river is the
Lawson-Lufini, which is navigable for thirty miles.
The next is the Mikené-Alima, which we can ascend
for thirty miles. Above this is the Likuba, navigable
for perhaps fifty miles. A few miles higher up the
mouth of the river, variously called Isanga, or Bunga,
which is probably the Likona of Ballaÿ, is reached.
From all reports this river may be ascended for
120 miles. Nearly opposite the mouth of-the Lukanga
is the Balui River, a large water entering by a delta.
My friend, Miyongo, of Usindi, lias led me to believe
by his itinerary that it will be navigable for 350 miles.
The next river as yet discovered above the Balui is
the large river of Ubangi, and above this is the Ngala,
flowing from the east into the Congo, half-way between
Upoto and Iboko. Some fifty miles of an ascent leads
.me to expect that, with its affluents, we shall find navigation
for about 450 miles, Numbers of large towns
are on its banks.
Above the Ngala is the Itimbiri, explored for thirty
miles. So far from its magnitude, and from the
native reports, I should estimate that we shall find