Elusive brothers in arms

History and fiction have their differences. The most obvious and the most important is that scrupulous historians hesitate to say anything for which they cannot provide some form of documentary evidence. But history and fiction are also more alike than is usually acknowledged. Both historians and novelists seek to show how the world operates (or operated) and both do so on the basis of fragmentary knowledge, the one chiefly from whatever survives in the various forms of historical record, the other chiefly from perceptions acquired from life in the world. The demarcation is less clearly defined than it once was. For some time — at least since the publication of Truman Capote’s In Cold Blood 40 years ago — genre boundaries have been collapsing everywhere. The deliberate blurring of the traditional boundary between the representational and the real occurs not just in the ‘non-fiction novel’ and what was dubbed the ‘new journalism’ of Norman Mailer and Hunter S.