In his last illuminated work, c. 1826-27, he surrounds a well-known classical sculpture with his own commentary on art, religion, and commerce: the profound and zany text from Blake's Laocoön.
257K image and annotated text, from Dan Archibald's excellent "Blake Archive for Humans."
The "bounding line": Verbal and Visual Linearity in Blake's "Laocoön" and Book of Urizen, by John Tolva.