farther and farther from the lost track where the pilot lay in his
blood; and still the mocking spirits of the desert, the afreets of the
mirage, led them on, and the hike glistening in the sunshine tempted
them to bathe in its cool waters, close to their eyes, but never at
their lips. At length the delusion vanished--the fatal lake had turned
to burning sand! Raging thirst and horrible despair! the pathless desert
and the murdered guide! lost! lost! all lost! Not a man ever left the
desert, but they were subsequently discovered, parched and withered
corpses, by the Arabs sent upon the search.

During our march the simoom was fearful, and the heat so intense that it
was impossible to draw the guncases out of their leather covers, which
it was necessary to cut open. All woodwork was warped; ivory
knife-handles were split; paper broke when crunched in the hand, and the
very marrow seemed to he dried out of the bones. The extreme dryness of
the air induced an extraordinary amount of electricity in the hair and
in all woollen materials. A Scotch plaid laid upon a blanket for a few
hours adhered to it, and upon being withdrawn at night a sheet of flame
was produced, accompanied by tolerably loud reports.

We reached Berber on May 31st, and spent a week in resting after our
formidable desert march of fifteen days. From the slight experience I
had gained in the journey, I felt convinced that success in my Nile
expedition would be impossible without a knowledge of Arabic. My
dragoman had me completely in his power, and I resolved to become
independent of all interpreters as soon as possible. I therefore
arranged a plan of exploration for the first year, to embrace the
affluents to the Nile from the Abyssinian range of mountains, intending
to follow up the Atbara River from its junction with the Nile in
latitude 17 deg. 37 min. (twenty miles south of Berber), and to examine