I picked up the review of copy of Introducing Literary Criticism: A graphic guide the other day – it's a neat volume published this month in a series of such introductions, a chronologically arranged primer in major critics and their views by Owen Holland. The cover tells you that the illustrations are by, simply, Piero. There are plenty of uncredited images in there, too, however, sometimes just adopted as background and presumably all out of copyright. About a third of the way through, the Piero cartoon version of Matthew Arnold, reproduced above, rang a bell. And when I turned the page, I saw why . . . .