Gazal into the Nile during this season,
and that the lake and the extensive marshes at that locality are caused
as much by the surplus water of the White Nile flowing into a
depression, as they are by the Bahr el Gazal, the water of the latter
river being absorbed by the immense marshes.
Yesterday we anchored at a dry spot, on which grew many mimosas of the
red bark variety; the ground was a dead flat, and the river was up to
the roots of the trees near the margin; thus the river is quite full at
this season, but not flooded. There was no watermark upon the stems of
the trees; thus I have little doubt that the actual rise of the
water-level during the rainy season is very trifling, as the water
extends over a prodigious extent of surface, the river having no banks.
The entire country is merely a vast marsh, with a river flowing through
the midst. At this season last year I was on the Settite. That great
river and the Atbara were then excessively low.
The Blue Nile was also low at the same time. On the contrary, the White
Nile and the Sobat, although not at their highest, are bank-full, while
the former two are failing; this proves that the White Nile and the
Sobat rise far south, among mountains subject to a rainfall at different
seasons, extending over a greater portion of the year than the rainy
season of Abyssinia and the neighbouring Galla country.
