William Pritchard's collection of essays and reviews on poets and poetry ranges from Dryden and Milton through the major American and British poets of the last century. One of them, Philip Larkin, answered an interviewer's question about what he had learned from his study of other poets by snapping back, "Oh, for Christ's sake, one doesn't study poets You read them, and think: That's marvelous; how is it done?" Although Pritchard has been talking...