| MW V.v.161 | [Falstaff to all] Ignorance itself is a plummet o'er me [i.e. has sounded me out] |
| Tem III.iii.103 | [Alonso to Gonzalo, of Ferdinand] I'll seek him deeper than e'er plummet sounded |
| Tem V.i.56 | [Prospero alone] deeper than did ever plummet sound / I'll drown my book |