| Play | Key Line | Modern Text | Original Text |
| Hamlet | Ham I.v.20 | Like quills upon the fretful porpentine. | Like Quilles vpon the fretfull Porpentine: |
| Henry IV Part 1 | 1H4 III.iii.11 | Sir John, you are so fretful you cannot live | Sir Iohn, you are so fretfull, you cannot liue |
| Henry VI Part 2 | 2H6 III.ii.403 | Away! Though parting be a fretful corrosive, | Away: Though parting be a fretfull corosiue, |
| King Lear | KL III.i.4 | Contending with the fretful elements: | Contending with the fretfull Elements; |