This prince did not adopt the wild idea of turning the course of the Nile out of its present channel; upon the possibility or impossibility of which, the argument (so warmly and so long agitated) always most improperly turns. His idea was to famish Egypt: and, as the fertility of that country depends not upon the ordinary stream, but the extraordinary increase of it by the tropical rains, he is said to
have found, by an exact survey and calculation, that there ran on the summit, or highest part of the country, several rivers which could be intercepted by mines, and their stream directed into the low country southward, instead of joining the Nile, augmenting it and running northward. By this he found he should be able so to disappoint its increase, that it never would rise to a height proper to fit Egypt for cultivation. And thus far he was warranted in his ideas of succeeding (as I have been informed by the people of that country), that he did intersect and carry into the Indian Ocean, two very large rivers, which have ever since flowed that way, and he was carrying a level to the lake Zawaia, where many rivers empty themselves in the beginning of the rains, which would have effectually diverted the course of them all, and could not but in some degree diminish the current below.
Death, the ordinary enemy of all these stupendous Herculean undertakings, interposed too here, and put a stop to this enterprize of Lalibala. But Amha Yafous, prince of Shoa (in whose country part of these immense works were) a young man of great understanding, and with whom I lived several months in the most intimate friendship at Gondar, assured me that they were visible to this day; and that they were of a kind whole use could not be mistaken; that
