During the Conqueror's reign, that great era of castle building, the keep was first erected; by the reign of Stephen it was so strong that he failed to take it from Baldwin de Redvers, who held it for Matilda. John kept the crown jewels here, good evidence of its solidity, also a few Frenchmen of high rank, of whom twenty-two were starved to death, or so tradition says. The Princess Eleanor, captive for forty years, was imprisoned here for a great part of that time by the same "Good King John" who, as a punishment for prophesying the king's downfall, had bold Peter, the hermit of Pontefract, incarcerated in the deepest dungeon and subsequently hanged. During the de Montfort rebellion the castle was held against the king. Edward was kept here for a time by Isabella before his murder at Berkley. The castle then passed through several hands until the time of Elizabeth, when it was sold to Sir Christopher Hatton. During this long period, the fabric was added to and improved until little of the Norman structure remained. All the new buildings seem to have been constructed with but one purpose, that of making an impregnable fortress. The widow of Sir Christopher sold the castle to Attorney-General Sir John Banks, ancestor of the Bankes of Kingston Lacy, in whose occupation, or rather in that of his wife, it was to have its invincibility put to the test. Sir John was with the king's forces at York in 1643 when the army of the Parliament gathered upon the Knowle and East hills. During six weeks repeated attacks were made by the forces of Sir Walter Earle, but without success, and eventually the siege was raised. In 1646 treachery succeeded where honest warfare failed. Colonel Pitman, an officer of the royal garrison, admitted a number of Roundheads, who obtained possession of the King's and Queen's towers. The remainder of the building became untenable by the poorly armed defenders, who had parted with their ordnance long before as a matter of policy. [Illustration: PLAN OF CORFE CASTLE.] Months were spent by the victorious Parliamentary forces in mining the foundations and in the systematic destruction of the magnificent defences. As we see it to-day, the actual masonry is practically in the condition left by the explosions, so massive is the material and so indestructible the mortar.