It has been alleged by Desaguliers,[296] that Savary, the reputed inventor of the steam-engine, obtained his notions from the work already named, “The Century of Inventions;” and that, in order to conceal the original, he purchased all the Marquess’s books that could be had for money, and committed them to the flames. Of this, however, we have no direct proof, and Captain Savary must be acquitted; but it is quite certain that, as already mentioned, the original work is so rare, that not a copy is to be found except in the British Museum, and perhaps in the Beaufort Libraries at Troy House or Badminton Park. It is to be observed, however, that no contemporary record exists to illustrate or verify the Marquess’s description of the contrivance, which we presume to call a Steam-Engine; or to inform us where, and in what manner, it was carried into effect. Yet it is very evident from his account, that he had actually constructed and worked a machine that raised water by steam; an operation which was sufficient to produce on the minds of rustics, the effect ascribed to the “roaring of lions,” as mentioned in the preceding anecdote. The Marquess’s description, though short and obscure, would appear to favour the belief, that the force of his engine was derived solely from the _elasticity_ of steam; and that the condensation of steam by cold was no part of his contrivance, but the invention of Captain Savary, who, in 1696--nearly thirty years after the Marquess’s death--published an account of his machine in a small tract, entitled, “The Miners’ Friend.” In these engines--several of which he had erected previously--the alternate condensation and pressure of the steam took place in the same vessel into which the water was first raised from a lower reservoir, by the pressure of the atmosphere, and then expelled into a higher one by the elastic force of strong steam. Steam was thus employed merely to produce a vacuum, and to supply the strength that was applied, for a like effect, to the sucker or piston of an ordinary pump; and it was a great and important step to have discovered a method of bringing the air to act in this manner, by the application of heat to water, without the assistance of mechanical force. To the simple incident which, during his confinement in the Tower of London, first set the warm and fertile imagination of the Marquess to work on this subject, we have already adverted; and must now turn from the curiosities of science, to such portions or features of Raglan Castle as still remain to be noticed.