III.iv.141 (479,5) You lack the season of all natures, sleep] I take the meaning to be, you want sleep, which seasons, or gives the relish to all nature. Indiget somni vitae condimenti.
III.v.24 (480,8) vaporous drop, profound] That is, a drop that has profound, deep, or hidden qualities.
III.v.26 (480,9) slights] Arts; subtle practices.
III.vi (481,1) Enter Lenox, and another Lord] As this tragedy, like the rest of Shakespeare's, is perhaps overstocked with personages, it is not easy to assign a reason why a nameless character should be introduced here, since nothing is said that might not with equal propriety have been put into the mouth of any other disaffected man. I believe therefore that in the original copy it was written with a very common form of contraction Lenox and An. for which the transcriber, instead of Lenox and Angus, set down Lenox and another Lord. The author had indeed been more indebted to the transcriber's fidelity and diligence had he committed no errors of greater importance.
III.vi.36 (482,3) and receive free honours] [Free for grateful. WARBURTON.] How can free be grateful? It may be either honours freely bestowed, not purchased by crimes; or honours without slavery, without dread of a tyrant.
IV.i (484,5) As this is the chief scene of enchantment in the play, it is proper in this place to observe, with how much judgment Shakespeare has selected all the circumstances of his infernal ceremonies, and how exactly he has conformed to common opinions and traditions:
Thrice the brinded cat hath mew'd.
The usual form in which familiar spirits are reported to converse with witches, is that of a cat. A witch, who was tried about half a century before the time of Shakespeare, had a cat named Rutterkin, as the spirit of one of these witches was Grimalkin; and when any mischief was to be done she used to bid Rutterkin go and fly, but once when she would have sent Rutterkin to torment a daughter of the countess of Rutland, instead of going or flying, he only cried mew, from whence she discovered that the lady was out of his power, the power of witches being not universal, but limited, as Shakespeare has taken care to inculcate:
Though his bark cannot be lost,
Yet it shall be tempest-tost.