Apparently John Clare, the English Romantic poet, ended up in St.  Crispins Hospital, and so did Robert Lowell, the modern American poet, after suffering a manic episode when he was passing through.  "That's the end of Northampton's link to world literature," Haddon says with a laugh.  Now happily living in Oxford, Haddon, 40, has big muscles from his penchant for marathon kayaking on the River Thames. 