In The Invisibles, Morrison has Urizen, a figure from Blake’s mythology, half-submerged in the polluted river. Mad Tom quotes Blake, “Urizen, deadly black, in chains bound.” For Blake, Urizen represented “your reason,” and was a negative figure bound in chains because man’s reliance on logic and reason to the exclusion of imagination and feelings is what traps us. Blake saw polluted London as an outward manifestation of these inner problems of man. -FantasyLiterature