Here’s a poem by Les Murray… He introduces it by saying “I keep a picture of my favourite phobia on the door of my study. It’s a fear of a road with a drop on one side, a corniche. And this poem is taken from that picture – it’s called ‘The Annals of Sheer’.”
http://www.poetryarchive.org/poem/annals-sheer
Walls and what we keep on them… and why.