Thus it is as regards the fish. And for anointing those of the Egyptians who dwell in the fens use oil from the castor-berry, which oil the Egyptians call _kiki_, and thus they do:--they sow along the banks of the rivers and pools these plants, which in a wild form grow of themselves in the land of the Hellenes; these are sown in Egypt and produce berries in great quantity but of an evil smell; and when they have gathered these some cut them up and press the oil from them, others again roast them first and then boil them down and collect that which runs away from them. The oil is fat and not less suitable for burning than olive-oil, but it gives forth a disagreeable smell. Against the gnats, which are very abundant, they have contrived as follows:--those who dwell above the fen-land are helped by the towers, to which they ascend when they go to rest; for the gnats by reason of the winds are not able to fly up high: but those who dwell in the fenland have contrived another way instead of the towers, and this it is:--every man of them has got a casting net, with which by day he catches fish, but in the night he uses it for this purpose, that is to say he puts the casting-net round about the bed in which he sleeps, and then creeps in under it and goes to sleep: and the gnats, if he sleeps rolled up in a garment or a linen sheet, bite through these, but through the net they do not even attempt to bite. Their boats with which they carry cargoes are made of the thorny acacia, of which the form is very like that of the Kyrenian lotos, and that which exudes from it is gum. From this tree they cut pieces of wood about two cubits in length and arrange them like bricks, fastening the boat together by running a great number of long bolts through the two-cubits pieces; and when they have thus fastened the boat together, they lay cross-pieces over the top, using no ribs for the sides; and within they caulk the seams with papyrus. They make one steering-oar for it, which is passed through the bottom of the boat; and they have a mast of acacia and sails of papyrus. These boats cannot sail up the river unless there be a very fresh wind blowing, but are towed from the shore: down-stream however they travel as follows:--they have a door-shaped crate made of tamarisk wood and reed mats sewn together, and also a stone of about two talents weight bored with a hole; and of these the boatman lets the crate float on in front of the boat, fastened with a rope, and the stone drags behind by another rope. The crate then, as the force of the stream presses upon it, goes on swiftly and draws on the _baris_ (for so these boats are called), while the stone dragging after it behind and sunk deep in the water keeps its course straight. These boats they have in great numbers and some of them carry many thousands of talents' burden.