"In the history of the Nile there was a void: its Sources were a mystery. The Ancients devoted much attention to this problem; but in vain. The Emperor Nero sent an expedition under the command of two centurions, as described by Seneca. Even Roman energy failed to break the spell that guarded these secret fountains. The expedition sent by Mehemet Ali Pasha, the celebrated Viceroy of Egypt, closed a long term of unsuccessful search."
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