The Works of William Shakespeare [Cambridge Edition] [Vol. 7 of 9]Note 4086 — Scene IV. Outside Macbeth's castle.[4072]Reading editionwilt] Warburton. will Ff.◇ravin up] Theobald, raven up F1. raven upon F2 F3 F4.◇Copy noteReturn to Scene IV. Outside Macbeth's castle.[4072]