In another interesting sixteenth century book, full of curious and wonderful machines, entitled “Theatrum Instrumentorum et Machinarum Jacobi Bessoni, Mathematici ingeniosissimi,” published in 1582, there are detailed illustrations and descriptions of a curious ship which is in shape something like a heart, the bow being the apex, so to speak; the stern has two ends, between which is fitted a species of paddle-wheel of unusual kind. It consists of a cigar-shaped object of wood, not unlike a modern torpedo, but broader. Through this is an axle which allowed the wheel to revolve freely, and on the axle at either end rests a vertical spar, which is fastened to another spar at the top parallel with the wheel. From the centre of this spar an enormous kind of mast or sprit rose high up into the air, which was worked by means of a tackle and ropes leading down to a winch, turned by two men. Thus, if the reader will imagine an object resembling one of those rollers employed in the preservation of a cricket pitch, but made of wood instead of metal, he will get something of the shape of this curious machine. Besson evidently thought a great deal of this invention and speaks of it as “inventum vix credibile,” but it was a clumsy method and cannot really have had many virtues to commend it. Seven years after Besson’s publication there appeared another book which throws light on the prevailing passion for mechanical propulsion, though it refers back to the time of the ancient galley. In “The History of Many Memorable Things Lost, which were in use among the Ancients ... written originally in Latin by Guido Pancirollus, and now done into English Vol. i.,” published in London in 1715, but first issued in 1589, the following statement is made on page 120:--“I saw also the pictures of some ships, called Liburnæ which had three wheels on both sides, without, touching the water, each consisting of eight spokes, jetting out from the wheel about an hand’s breadth, and six oxen within, which by turning an engine stirr’d the wheels, whose Fellys [spokes], driving the water backwards, moved the Liburnians with such force that no three-oar’d gally was able to resist them.” This would seem to confirm the statement that the ancient inhabitants of the Mediterranean certainly employed the paddle-wheel.