| Play | Key Line | Modern Text | Original Text |
| Henry IV Part 1 | 1H4 V.ii.19 | A hare-brained Hotspur, governed by a spleen. | A haire-brain'd Hotspurre, gouern'd by a Spleene: |
| Henry VI Part 1 | 1H6 I.ii.37 | Let's leave this town; for they are hare-brained slaves, | Let's leaue this Towne, / For they are hayre-brayn'd Slaues, |
| King Edward III | E3 III.i.51 | There comes a hare-brained nation, decked in pride, | There comes a hare braind Nation deckt in pride, |