But a year before Pancirolli published his book there appeared another interesting work, which shows yet again that the employment of paddle-wheeled craft was far from non-existent. There is a scarce book in the British Museum, published in 1588, entitled “Le Diverse et Artificiose Machine del Capitano Agostino Ramelli,” which is illustrated with some highly informative plates. Fig. CLII. shows a kind of pontoon, to be employed by the enemy in attacking a town from the other side of a stream or river. A horse brings a rectangular shaped construction down to the water’s edge, where it is launched and floats. Everywhere this kind of built-up dray is covered in, but in the bows a man is seen firing his harquebus from his protected shelter, while on either side of this craft a paddle-wheel is seen revolving with its six blades, that are not straight, as in the modern wheels, but curved inwards like a scythe. The illustration shows these wheels being turned by a man standing up inside; the wheels are quite open, without paddle-boxes. An oar projecting at the stern enables the craft to be steered. We see, then, that that earliest form of ship propulsion by mechanical means, the paddle-wheel, was thoroughly grafted into man’s mind long before he had brought about the steamboat. We cannot give here every theory and suggestion which the seventeenth century put forward, but we can state that during this period various patents were being taken out for making boats to go against wind and tide, some of which were conspicuously distinguished by their display of ingenuity to overcome the forces of Nature. We come across all sorts of ideas for “to make boats, shippes, and barges to go against strong wind and tide,” “to draw or haul ships, boates, etc., up river against the stream,” “to make boates for the carryage of burthens and passengers upon the water as swifte in calms and more saft [_sic_] in stormes than boates full sayled in greater wynes.” The Marquis of Worcester, in 1663, published a little book entitled “A Century of the Names and Scantlings of Inventions,” and he himself patented an invention for sending a boat against the stream by using the actual force of the wind and stream in a reverse manner. But the fact to be borne in mind for our present purpose is that from all these ingenious propositions nothing practical ever evolved that was found to be of any service to man, or the transportation of his commerce. At any rate, there is no record of this. [Illustration: HERO’S STEAM APPARATUS. _From the Exhibit in the Victoria and Albert Museum, South Kensington._]