A Joy For Ever is a book about art, art history and the art collecting market and contains the following passage: "The title of this book, -or, more accurately, of its subject;-for no author was ever less likely than I have lately become, to hope for perennial pleasure to his readers from what has cost himself the most pains, -will be, perhaps, recognised by some as the last clause of the line chosen from Keats by the good folks of Manchester, to...