Histories

Yet I think that the sun never lets go of all of the water that it draws up from the Nahr an- Nil [31.1,30.166] (river), AfricaNile yearly, but keeps some back near itself. Then, as the winter becomes milder, the sun returns to the middle of the heaven, and after that draws from all rivers alike.

Meanwhile, the other rivers are swollen to high flood by the quantity of water that falls into them from the sky, because the country is rained on and cut into gullies; but in the summer they are low, lacking the rain and being drawn up too by the sun.