It's been reported that a new book on the life of Keats suggests he was drowsy and inspired by opiates far longer than had been hitherto claimed, particularly in 1818-1819, around the time of his brother's death from TB, and some of Keats' greatest poems. Laudanum, opium, heroin - take your pick, these and other drugs have been used by people for centuries; some of the people who used them were artists, even geniuses; most were not, some monumental bores. As someone noted years ago in the cult film Liquid Sky, David Bowie was Bowie before the drugs. I expect without Keats' poetic skills, insights and brilliance, the drugs wouldn't have worked. New worlds swim into view on peaks without unnatural highs. Peeking into Chapman will do.