Overwhelming current the total drainage of four
large rivers - the Settite, Royan, Salaam, and Angrab - in addition to its
own original volume. Its waters are dense with soil washed from most
fertile lands far from its point of junction with the Nile; masses of
bamboo and driftwood, together with large trees, and frequently the dead
bodies of elephants and buffaloes, are hurled along its muddy waters in
wild confusion, bringing a rich harvest to the Arabs on its banks, who
are ever on the look-out for the river's treasures of fuel and timber.
The Blue Nile and the Atbara receiving the entire drainage of Abyssinia,
at the same time pour their floods into the main Nile in the middle of
June. At that season the White Nile is at a considerable level, although
not at its HIGHEST; and the sudden rush of water descending from
Abyssinia into the main channel, already at a fair level from the White
Nile, causes the annual inundation in Lower Egypt.
During the year that I passed in the northern portion of Abyssinia and
its frontiers, the rains continued with great violence for three months,
the last shower falling on the 16th September, from which date there was
neither dew nor rain until the following May. The great rivers expended,
and the mountain torrents dried up; the Atbara disappeared, and once
more became a sheet of glaring sand. The rivers Settite, Salaam, and
Angrab, although much reduced, are nevertheless perennial streams,
flowing into the Atbara from the lofty Abyssinian mountains; but the
parched, sandy bed of the latter river absorbs the entire supply, nor
does one drop of water reach the Nile from the Atbara during the dry
season. The wonderful absorption by the sand of that river is an
illustration of the impotence of the Blue Nile to contend unaided with
the Nubian deserts, which, were it not for the steady volume of the
White Nile, would drink every drop of water before the river could pass
the twenty-fifth degree of latitude.
The principal affluents of the Blue Nile are the Rahad and Dinder,
flowing, like all others, from Abyssinia. The Rahad is entirely dry
during the dry season, and the Dinder is reduced to a succession of deep
pools, divided by sandbanks, the bed of the river being exposed. These
pools are the resort of numerous hippopotami and the natural inhabitants
of the river.
Having completed the exploration of the various affluents to the Nile
from Abyssinia, passing through the Base country and the portion of
Abyssinia occupied by Mek Nimmur, I arrived at Khartoum, the capital of
the Soudan provinces, on the 11th June, 1862.
Khartoum is situated in lat. 15 degrees 29 minutes, on a point of land
forming the angle between the White and Blue Niles at their junction.
