Lewis attributed his longevity to a mandatory bottle of red wine a day, but I suspect he lived so long because he remained both curious about, and engaged with, this teeming world of ours. His obituarists have been quick to point how singularly unrewarded Lewis's career was, despite the fact that as well as writing numerous novels, he was the author of some acknowledged travel writing classics. But my view is that only pets ever really win prizes - literary or otherwise - and whatever else he was, Lewis wasn't one of those.