were more dangerous than the Great Willow: his heart was rotten, but his strength was green; and he was cunning, and a master of winds, and his song and thought ran through the woods on both sides of the river.
Greene deploys Old Man Willow as an archetypal figure for the shadow’s hidden malevolence — outwardly vital but inwardly corrupt, its invisible psychic rootwork colonizing the unconscious like poison spreading through an underworld river.
, The Astrology of Fate, 1984thesis