A surfeit of anniversaries this week reminded us that on the day of President Kennedy’s assassination, C.S. Lewis (born 1898) and Aldous Huxley (born 1894) also died. Three such different figures are hard to imagine — Kennedy, the wily politician, Lewis, the tortured academic, Huxley the cool intellectual. Lewis is the one whose image and personality don’t fit; a man who appears cast from a different age from Kennedy and also from Huxley, who you can well imagine wielding an iPod and Twitter account.