Revolution followed, in 1789, when the Marquis de Jouffroy, in order to save his life, had to go into exile for some time, and on his return, ere he was able to obtain a patent for his achievement, someone else had stepped in and forestalled him. In the meantime, in England, something more practicable than Hulls’ efforts had brought about was to be witnessed. If the reader will examine the illustration facing this page he will see a model of a curious double-hulled ship, which was one of eight or more paddle-propelled vessels that were employed in the experiments carried out by Patrick Miller, a wealthy Edinburgh banker. This particular vessel was built at Leith in 1787, and it is amusing to see in her that old idea of physical propulsion brought forward once more. Between the two hulls sufficient space was left for the insertion of five paddle-wheels, 7 feet in diameter, immediately behind each other, which were driven by thirty men, heaving away at the capstan placed on deck. We find pretty much the same speed to be obtained as in the experiments which we have mentioned in connection with other craft thus propelled, for the best effort when all these hands were working to get her through the water appears to have been under 4½ knots per hour. In our illustration she is seen with masts and sails which she used when the paddle-wheels were lifted out of the water and placed on deck. It will be noticed that she was steered by a couple of rudders; her displacement was 255 tons. This probably represents the final development of Miller’s design using muscular power, but an earlier and smaller ship belonging to the previous year carried only two paddle-wheels, 6 feet in diameter and 4 feet wide, which were placed on each side of the middle hull, for this ship was not double- but triple-hulled. [Illustration: PATRICK MILLER’S DOUBLE-HULLED PADDLE-BOAT. _From the Model in the Victoria and Albert Museum._] [Illustration: SYMINGTON’S FIRST MARINE ENGINE. _From the Model in the Victoria and Albert Museum._]