Luke's Strategy—The Garrison Outwitted—The Friar's Opinion—Another Tower to be Sacrificed—The Friar's Confidence—Amabel's Mission—The Count Takes the Southwest Tower—The Tower Burned—A Surprise—The Explosion of the Mine—The Besiegers Are Panic-Stricken—Their Retreat—Fall of the Southwest Tower—Terror of the Besiegers—The Siege Suspended—Fears of a Sortie—Departure of the Lady Amabel—Will the Castle Holdout?