According to Liam Rogers’ article on the Malverns at
whitedragon.org.uk/articles/malverns.htm
there is a spring on the north of British Camp called Pewtress Spring*, and this is where William Langland fell asleep and received his inspiration for ‘Piers Plowman’ (must have been the soothing white noise). This is a long alliterative poem second only to Chaucer’s Canterbury Tales in medieval literature.
In the first of eleven visions the narrator, called The Dreamer, similarly resting by a stream, looks down at the people below the Malvern hills and instructs them to follow a pilgrimage towards salvation and truth.
You can read the first part of the poem at Representative Poetry Online
eir.library.utoronto.ca/rpo/display/poem1226.html
(*now the Primeswell spring where, disappointingly, the evil empire CocaCola bottles Malvern Water from? guardian.co.uk/uk_news/story/0,,1357991,00.html )