30 deg.

7'.

The course of the river up to this point was, from its entry into the country, about 540 miles.

At Cercasorus the Delta began.
The river threw out two branches, which flowed respectively to the north-east and the north-west, while between them was a third channel, a continuation of the previous course of the stream, which pierced the Delta through its centre, flowing almost due north.

Lower down, further branch channels were thrown out, some natural, some artificial, and the triangular tract between the two outer arms of the river was intersected by at least five, and (in later times) by fourteen large streams.