About fourteen miles south from Plymouth, and ten from the Ram's Head, on the Cornish coast, lies a perilous reef of rocks, against which the long rolling swell of the Atlantic waves dashes with appalling force, and breaks up into those swirling eddies from which the reef is named--the Eddystone. Upon these treacherous crags many a gallant vessel has foundered and gone down within sight of the shore it had scarcely quitted or was just about to reach; and situated in the midst of a much frequented track, the rapid succession of calamities at the Eddystone was not long in awakening men's minds to the necessity of some warning light. The exposure of the reef to the wild fury of the Atlantic, and the small extent of the surface of the chief rock, however, rendered the construction of a lighthouse in such a situation a work of great and (as it was long considered) insuperable difficulty. The project was long talked of before any one was found daring enough to attempt the task; and when at length in 1696 Henry Winstanley stepped forward to undertake it, he might have been thought of all others the very last from whose brain so serious a conception would have emanated. The great hobby of his life had been to fill his house at Littlebury, in Essex, with mechanical devices of the most absurd and fantastic kind. If a visitor, retiring to his bedroom, kicked aside an old slipper on the floor, purposely thrown in his way, up started a ghost of hideous form. If, startled at the sight, he fell back into an arm chair placed temptingly at hand, a pair of gigantic arms would instantly spring forth and clasp him a prisoner in their rude embrace. Tired of these disagreeable surprises, the astonished guest perhaps took refuge in the garden, and sought repose in a pleasant arbour by the side of a canal; but he had scarcely seated himself, when he found himself suddenly set adrift on the water, where he floated about till his whimsical host came to his relief. Such was the man who now entered upon one of the most formidable engineering enterprises in the world.