Peter Humphrey was a founding member of the Coventry Art Circle along with Harry Norman. CAC had links with Surrealist painters in Birmingham, and had high-level art critics among their members and developed styles based on cubism, abstraction and other modern movements.
A review in the Birmingham Post (7 March 1938) described CAC as follows '…the organisation serves as a rallying point for a number of people…who feel an urge towards some sort of artistic expression… …a prolific contributor, P. Humphries [sic]…the artist has been concerned to minimise the solid appearance of things and insist upon a free interpretation of their rhythmic unity. Art of this kind may tend to become highly mannered, but Mr. Humphries has so much skill and so many styles at his command that monotony is wholly absent from his work.'