| Cor IV.i.30 | [Coriolanus to Volumnia] I go alone, / Like to a lonely dragon that his fen / Makes feared and talked of more than seen |
| Tem I.ii.322 | [Caliban to Prospero and Miranda] wicked dew ... from unwholesome fen |
| Tem II.i.51 | [Antonio to Sebastian, of the air] Or, as 'twere perfumed by a fen |
| Tem II.ii.2 | [Caliban alone] All the infections that the sun sucks up / From bogs, fens, flats |