"Each illustration is protected by an interleaf made of blush tracing paper, an old book tradition often used in the livre d’artiste. This creates the peculiar effect of a curtain, behind which we can discern, as if in a haze, the full-page illustrations printed in a brownish ink on cream-tinted watercolour paper <...> The frontispiece shows the silhouettes of the Singer Company Building on Nevsky Prospect in Saint Petersburg, where Dom Knigi (“House of the Book”) is located, and the Kazan Cathedral. Above them float the artist’s moving eye."
January 1, 1970
https://en.wikiquote.org/wiki/Green_Book_(1989)