To be a good illustrator, said Mervyn Peake, it is necessary to do two things. The first is to subordinate yourself entirely to the book. The second is ‘to slide into another man’s soul’.

In 1933, at the age of 22, Peake did precisely that. Relinquishing his studies at the Royal Academy Schools to move to Sark, in the Channel Islands, he co-founded an artists’ colony and took to sketching fishermen and romantic, ripple-lapped coves.