Dos-a-dos case binding with a disappearing spine construction. The boards are covered in Tyvek which was hand coloured with acrylic inks, coloured Tyvek also used for spine and and endbands. All edges are rough edged gilded – L’Allegro and Il Penseroso poems are edge gilded with different golds, with the colours chosen to reflect the contrasting content of the two poems (day/night, playful/thoughtful). Simple made endpapers using different colours for the two poems.
The use and the colouring of Tyvek was experimental and the colours were intended to bring to mind the vibrancy of the original William Blake illustrations of the poems now in the Morgan Library in New York.