If I had a time machine that could not only set me down not only in a particular date, but a particular place, I’d choose the Eagle and Child pub in Oxford on a Tuesday night in 1950 when C.S.Lewis was reading selections from his Chronicles of Narnia. He’d be there before a roaring fire with Tolkien and the other Inklings who gathered at the Bird and Baby, to drink beer, smoke pipes and read excerpts from their work. Tolkien would listen…