For centuries, readers have written in the margins of their books to indicate admiration, disagreement or inspiration. Plath was no different.
Dorothy Wordsworth's ambitious walking practices helped to encourage female mountaineers to follow in her footsteps.
The Romantics - including poets William Blake and William Wordsworth - lived in the 18th century, but their passionate ideas about imagination and nature are still influential today.
The long, dark days of winter can be a particularly lonely time for some people. But hermits, in many religious traditions, often found joy in being alone.