The Borderers' by William Wordsworth is a/an -

The only play of William Wordsworth is The Borderers.
The Borderers, a tragedy in five acts, was Wordsworth's first major work. 

William Wordsworth is an English poet whose ‘Lyrical Ballads’ (1798), written with Samuel Taylor Coleridge, helped launch the English Romantic movement.

Famous poems of Wordsworth:
- The Solitary Reaper,
- Tintern Abbey,
- Rainbow,
- Lucy Poems,
- The Daffodils,
- Ode on immortality,
- The Excursion,
- Michael etc.

Source: Encyclopaedia Britannica