What is it about maps? I could look at them all day, intently studying the names of towns and villages I have never heard of and will never visit, tracing the course of obscure rivers, checking elevations, consulting the marginal notes to see what a little circle with a flag on it signifies and what’s the difference between a pictogram of an airplane with a circle around it and one without, issuing small profound “hmmmms” and nodding my head gravely without having the faintest idea why.