"My lord, for aught I know....—What dost thou think?
Think, my lord?—Think, my lord! By Heaven he echoes me."
"It is the green-eyed monster which doth mock
The meat it feeds on."
This is the reading of the old copies. Southern and Hanmer read make for 'mock,' which appears to me to be indubitable; for this is the very thing which jealousy does—witness Ford and Leontes—while I cannot see how jealousy, which is given to anything rather than mockery, should mock its food. Singer and Dyce, however, retain 'mock,' but without giving any explanation.
"I slept the next night well, was free and merry."
So the 4tos and the editors read; the folio inserts fed well after 'well,' which may be right, as six-foot lines abound in this play. With Singer I have therefore retained it.