Though not so celebrated as the Eddystone, the South Stack Lighthouse is unquestionably one of the marvels of science, and as such may be appropriately described in our pages. It is erected on the summit of an isolated rock, three or four miles westward from Holyhead, and separated from the main land by a chasm ninety feet in width. This splendid structure was raised in the year 1808. The elevation of the summit of the rock on which it is erected is 140 feet above the level of the sea at high-water mark; the height of the tower, from the base to the gallery, is sixty feet; and the lantern is twelve feet high from the gallery; making the total elevation of the light 212 feet above high-water mark. The light is produced by twenty-one brilliant lamps, with powerful reflectors, placed on a revolving triangular frame, displaying a full-faced light every two minutes, which, in clear weather, is distinctly visible at a distance of ten leagues. Latterly there has been an addition of three red lights placed at the rock, which are more distinctly visible in foggy weather than the lighthouse lights. The rough sea caused by the strong tides about the head rendered the communication by boat very precarious. In order to obviate the danger, a passage was contrived by means of two ropes thrown across the gulf, along which the individual was drawn in a box or cradle, by the assistance of pulleys affixed at each end. This plan was superseded by a bridge of ropes, which was used some years after, though always considered unsafe, on account of the constant wear of the ropes. In 1827, a modern suspension chain-bridge was thrown over the sound, the span of which is 110 feet, the chains being firmly bolted in the rock on each side, and carried over two massive stone pillars erected for the purpose. The chain supports a platform of timber five feet wide, and seventy feet above high-water mark. The bridge is attained by descending the Holyhead mountain in a zigzag direction by a flight of 380 steps. BRASS MEDAL OF OUR SAVIOUR. In 1702, the late Rev. H. Rowlands, author of _Mona Antiqua_, while superintending the removal of some stones, near Aberfraw, Wales, for the purpose of making an antiquarian research, found a beautiful brass medal of our Saviour, in a fine state of preservation, which he forwarded to his friend and countryman, the Rev. E. Llwyd, author of the _Archeologiae Britannica_, and at that time keeper of the Ashmolean library at Oxford.