There came up out of the river seven well-favored kine - This must certainly refer to the hippopotamus or river horse, as the circumstances of coming up out of the river and feeding in the field characterize that animal alone. The hippopotamus is the well-known inhabitant of the Nile, and frequently by night comes out of the river to feed in the fields, or in the sedge by the river side.

So Pharaoh awoke.

1 Kings 3:15 And Solomon awoke; and, behold, it was a dream. And he came to Jerusalem, and stood before the ark of the covenant of the LORD...

The First Chaldaean Empire and the Hyksos in Egypt
Syria: the part played by it in the ancient world--Babylon and the first Chaldaean empire--The dominion of the Hyksos: Ahmosis. Some countries seem destined from their origin to become the battle-fields of the contending nations which environ them. Into such regions, and to their cost, neighbouring peoples come from century to century to settle their quarrels and bring to an issue the questions of supremacy which disturb their little corner of the world. The nations around are eager for the possession …
G. Maspero—History Of Egypt, Chaldaea, Syria, Babylonia, and Assyria, V 4