Caithness, Lines 13-17aPerformance VideosAct 5,Scene 2Lines 13-17aCaithness performs a speech from Act 5, Scene 2 of myShakespeare's Macbeth. Video of myShakespeare | Macbeth 5.2 Performance: Caithness, Lines 13-17a Caithness Great Dunsinane he strongly fortifies. Some say he's mad; others that lesser hate him Do call it valiant fury. But for certain, He cannot buckle his distempered cause Within the belt of rule.