When the Nahr an- Nil [31.1,30.166] (river), AfricaNile begins to rise, hollow and marshy places near the river are the first to begin to fill, the water trickling through from the river, and as soon as they are flooded, they are suddenly full of little fishes.

Where these probably come from, I believe that I can guess. When the Nahr an- Nil [31.1,30.166] (river), AfricaNile falls, the fish have dropped their eggs into the mud before they leave with the last of the water; and when in the course of time the flood comes again in the following year, from these eggs at once come the fish.