The Tigris passes through Asia Minor and brings with it the water of
three lakes, one after the other of various elevations; the first
being Munace and the middle Pallas and the lowest Triton. And the
Nile again springs from three very high lakes in Ethiopia, and runs
northwards towards the sea of Egypt with a course of 4000 miles, and
by the shortest and straightest line it is 3000 miles. It is said
that it issues from the Mountains of the Moon, and has various
unknown sources. The said lakes are about 4000 braccia above the
surface of the sphere of water, that is 1 mile and 1/3, giving to
the Nile a fall of 1 braccia in every mile.

[Footnote 5: _Incogniti principio._ The affluents of the lakes are
probably here intended. Compare, as to the Nile, Nos. 970, 1063 and
1084.]