They then abandoned the perpendicular line, and made
a sharp turn westward toward Ghat, guided, with difficulty,
by the Touaregs. After a thousand scenes of pillage, of
vexation, and attacks by armed forces, their caravan
arrived, in October, at the vast oasis of Asben. Dr. Barth
separated from his companions, made an excursion to the
town of Aghades, and rejoined the expedition, which
resumed its march on the 12th of December. At length it
reached the province of Damerghou; there the three travellers
parted, and Barth took the road to Kano, where he
arrived by dint of perseverance, and after paying
considerable tribute.
In spite of an intense fever, he quitted that place on
the 7th of March, accompanied by a single servant. The
principal aim of his journey was to reconnoitre Lake Tchad,
from which he was still three hundred and fifty miles distant.
He therefore advanced toward the east, and reached
the town of Zouricolo, in the Bornou country, which is the
core of the great central empire of Africa. There he heard
of the death of Richardson, who had succumbed to fatigue
and privation. He next arrived at Kouka, the capital of
Bornou, on the borders of the lake. Finally, at the end
of three weeks, on the 14th of April, twelve months after
having quitted Tripoli, he reached the town of Ngornou.
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