On location: Maps, territories and train toilets

Can I be alone in finding the new toilets on trains peculiarly unsettling? There is something about all those buttons and lights, about the way the curved door groans shut, that contrives to make these smallest rooms feel provisional and exposed. I miss the heft and security of a toilet door you can shut and bolt manually: what automation gives, it can so easily take away, leaving your buttocks exposed to the commuting multitudes.

Anyway, I was meditating on this the other day as I wandered a...