The Delta, c. 960
The sea which borders Egypt is bitter, but where the river Nile pours into it, and overcomes it, the waters of the sea are rendered sweet. Farther out, when the waters of the Nile are confounded with the sea, the bitterness again predominates. In the sea there are islands, to which one may pass over in boats or vessels. Of these islands are Teneis (or Teines) and Damiat. In each of these agriculture is practised and cattle are kept.... The waters of this sea are not very considerable, and vessels move on it by help of men. It produces a certain fish, which is called delfin (dolphin), and this is a fish which if any person eat, he will be troubled with horrible dreams.