This oil is
black, and much resembles tar in appearance; it has the effect of
preserving the leather, and of rendering it perfectly
water-tight. In desert travelling each person should have his own
private water-skin slung upon his dromedary; for this purpose
none are so good as a small-sized gazelle skin that will contain
about two gallons.
On the 23d June we were nearly suffocated by a whirlwind that
buried everything within the tents several inches in dust; the
heat was intense; as usual the sky was spotless, but the simoom
was more overpowering than I had yet experienced. I accordingly
took my rifle and went down to the pool, as any movement, even in
the burning sun, was preferable to inaction in that sultry heat
and dust. The crocodiles had dragged the skeletons of the
hippopotami into the water; several huge heads appeared and then
vanished from the surface, and the ribs of the carcase that
projected, trembled and jerked as the jaws of the crocodiles were
at work beneath. I shot one of very large size through the head,
but it sank to the bottom; I expected to find it on the following
morning floating upon the surface when the gas should have
distended the body.
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