“Coming from a country where mapmakers tend to exclude any landscape feature smaller than, say, Pike’s Peak, I am constantly impressed by the richness of detail on the OS 1:25,000 series. They include every wrinkle and divot of the landscape, every barn, milestone, wind pump and tumulus. They distinguish between sand pits and gravel pits and between power lines strung from pylons and power lines strung from poles. This one even included the stone seat on which I sat now. It astounds me to be able to look at a map and know to the square metre where my buttocks are deployed.”