Peter Ackroyd

Thomas More's birth was noted by his father upon a blank page at the back of a copy of Geoffrey of Monmouth's 'Historia Regum Britanniae'; for a lawyer John More was remarkably inexact in his references to that natal year, and the date has been moved from 1477 to 1478 and back again.

Why should a novelist not also be a historian? To force unnatural divisions within the English language is to work against its capacious and accommodating nature. To expect a writer to produce only novels, or only histories, is equivalent to demanding from a composer that he or she write only string quartets or piano sonatas.

The historical novelist has to consider what has actually happened, while the SF writer is dealing in possibilities, but they are both in the business of imagining a world unlike our own and yet connected to it.