It is said in some of the romances that twice a year the Castle of Tintagel became invisible to the eyes of the common people. To-day it is only in imagination that we can perceive the real castle of Arthur, for whatever British fortress may ever have risen on these heights has long since vanished--crumbled away into dust which is as nothingness. Authentic history takes us back only to the time of the Norman Conquest, when Tintagel was entered in Domesday Book as Dunchine, or Chain Castle. It is the firm opinion of archæologists that the Romans entrenched themselves here and left signs of their occupation, and there are the strongest reasons for believing that Tintagel was a British place of defence before the Roman invasion. Nature had marked out the rocky height as a stronghold, and a race like the Britons could scarcely have failed to avail themselves of all the advantages it offered. But when we first read of Tintagel Castle apart from the romances we find it in the occupation of English princes, notably of Richard, Earl of Cornwall, otherwise known as the King of the Romans, who in 1245 gave noble entertainment to his nephew, Prince of Wales, then carrying on a desperate war for freedom against the English king. The use of Tintagel as a prison from which escape was almost impossible was recognised from early times until the reign of Elizabeth, at which era it began to fall into decay; and it was within the loneliest and most exposed portion of the island that John Northampton, Lord Mayor of London, who had abused his office, was immured for life by order of Richard II. A sculptured moorstone, now moss-covered and illegible, commonly called the altar-stone of King Arthur’s Chapel, is believed in reality to be a monument of John Northampton’s own carving, wrought to pass away the dreary days in his dungeon, and now marking the place of his tomb. What is known as King Arthur’s Chapel is a spacious chamber fifty-four feet long and twelve feet wide, the outline of which is barely traceable. It is supposed to have been dedicated to Saint Uliane.