The Rime of the Ancient Mariner (Axium, 1969).
The work of French artist Roland Cat is less Surreal—although some of it could be classed as such—than Fantastic in a manner similar to that of contemporaries such as Michel Henricot, Jean-Pierre Ugarte, Jean-Marie Poumeyrol, Gérard Trignac and others. Art of this nature receives support and encouragement from the French to a degree which often seems inversely proportional to the ignorance it receives from the Anglophone art world. For years the only example of Cat’s work I’d seen was the picture that Dave Britton used on the cover of the Savoy edition of New Worlds magazine in 1979. The examples here are the result of a web trawl, hence the missing titles and dates.
The Coleridge illustration above was for a volume that was part of a series produced by a French publisher in 1969, each edition of which was illustrated by a different artist. This forum post has more details. For more about Roland Cat see this short appraisal at Visionary Review.
Dagon (Belfond, 1987).