In Sept 2021, Iain Sinclair gave a talk to the Blake Society about how Blake’s poem, The Mental Traveller, became the map and model for a lifetime of journeys and pilgrimage quests. The Mental Traveller was an awakening, to be experienced but not yet understood. The poem returned at various points in the years that followed, until it was acknowledged as the secret code for Sinclair’s most recent book, The Gold Machine, a late-life expedition to one of the sources of the Amazon, in the footsteps of his great-grandfather.