On my way back home I found this really eerie piece of art in one of the tunnels...
@HisNameIsOx Eerie indeed!
It appears to be an ode to the poet William Blake and his Songs of Innocence and of Experience illustrated collection. The illustrations you see are typical of the original style.
The first two lines reference Garden of Love; a poem from pt2 of the collection, Songs of Experience.
The remaining lines reference The Chimney Sweep, from pt1 of the collection, Songs of Innocence.
Blake was often considered insane by his peers.