Posted earlier this year on his Instagram which, I believe, is maintained by his daughter, Stella Keen, you can see the full magnificence of Keen’s collage work for his Amazing Rayday Secret Comics. These date from between 1962-1967, measure 42 x 32 cm and were a definite influence on my own recent collage comic.

Also seen here are two precursors to the above, ‘Atomic Rayday’ and ‘Amazing Rayday’ that date from 1962.