A figure seen from the back kneels at an altar before the glaring, darkened form of a numinous planet. As a frontispiece this image marks the entrance to The Song of Los, and now it also leads us into William Blake: Visionary, the stunning catalogue of the Getty exhibition that was due to open from 21 July to 11 October 2020, but has been postponed to fall 2023 because of the COVID-19 pandemic.