The chief cause which made the fusion of the different elements of society so imperfect was the extreme difficulty which our ancestors found in passing from place to place. Of all inventions, the alphabet and the printing press alone excepted, those inventions which abridge distance have done most for the civilisation of our species. Every improvement of the means of locomotion benefits mankind morally and intellectually as well as materially, and not only facilitates the interchange of the various productions of nature and art, but tends to remove national and provincial antipathies, and to bind together all the branches of the great human family. In the seventeenth century the inhabitants of London were, for almost every practical purpose, farther from Reading than they now are from Edinburgh, and farther from Edinburgh than they now are from Vienna. The subjects of Charles the Second were not, it is true, quite unacquainted with that principle which has, in our own time, produced an unprecedented revolution in human affairs, which has enabled navies to advance in face of wind and tide, and brigades of troops, attended by all their baggage and artillery, to traverse kingdoms at a pace equal to that of the fleetest race horse. The Marquess of Worcester had recently observed the expansive power of moisture rarefied by heat. After many experiments he had succeeded in constructing a rude steam engine, which he called a fire water work, and which he pronounced to be an admirable and most forcible instrument of propulsion. [131] But the Marquess was suspected to be a madman, and known to be a Papist. His inventions, therefore found no favourable reception. His fire water work might, perhaps, furnish matter for conversation at a meeting of the Royal Society, but was not applied to any practical purpose. There were no railways, except a few made of timber, on which coals were carried from the mouths of the Northumbrian pits to the banks of the Tyne. [132] There was very little internal communication by water. A few attempts had been made to deepen and embank the natural streams, but with slender success. Hardly a single navigable canal had been even projected. The English of that day were in the habit of talking with mingled admiration and despair of the immense trench by which Lewis the Fourteenth had made a junction between the Atlantic and the Mediterranean. They little thought that their country would, in the course of a few generations, be intersected, at the cost of private adventurers, by artificial rivers making up more than four times the length of the Thames, the Severn, and the Trent together.