With Betjeman, Clark shared a taste for girls of the ilk of Joan Hunter-Dunn, and of Piper, he wrote that when he first knew him the painter had, like Betjeman, "... already discovered the charm, both decorative and symbolic, of some neglected aspects of English building." Charming, decorative, symbolic and neglected - dangerous words, all of them, in the context of English art, seductive to the amateur; throw in the sleight-of-hand of repeated practice, the assured mannerism, the deft trick, the reliable devices of distorted perspective, high colour and dramatic lighting, and we have the essence of the mature work of John Piper, a maturity that endured, unmodified, for half a century.