About the time of Sennacherib (B.C. 700), or a little earlier, some great advances seem to have been made by the Phoenician shipbuilders. In the first place, they introduced the practice of placing the rowers on two different levels, one above the other; and thus, for a vessel of the same length, doubling the number of the rowers. Ships of this kind, which the Greeks called “biremes,” are represented in Sennacherib’s sculptures as employed by the inhabitants of a Phoenician city, who fly in them at the moment when their town is captured, and so escape their enemy.[96] The ships are of two kinds. Both kinds have a double tier of rowers, and both are guided by two steering oars thrust out from the stern; but while the one is still without mast or sail, and is rounded off in exactly the same way both at stem and stern, the other has a mast, placed about midship, a yard hung across it, and a sail close reefed to the yard, while the bow is armed with a long projecting beak, like a ploughshare, which must have been capable of doing terrible damage to a hostile vessel. The rowers, in both classes of ships, are represented as only eight or ten upon a side; but this may have arisen from artistic necessity, since a greater number of figures could not have been introduced without confusion. It is thought that in the beaked vessel we have a representation of the Phoenician war-galley; in the vessel without a beak, one of the Phoenician transport.[97] A painting on a vase found in Cyprus exhibits what would seem to have been a pleasure-vessel.[98] It is unbeaked, and without any sign of oars, except two paddles for steering with. About midship is a short mast, crossed by a long spar or yard, which carries a sail, closely reefed along its entire length. The yard and sail are managed by means of four ropes, which are, however, somewhat conventionally depicted. Both the head and stern of the vessel rise to a considerable height above the water, and the stern is curved, very much as in the war-galleys. It perhaps terminated in the head of a bird.