There will be rain today, says the voice on the radio. You will need your umbrella, he says. I am looking around for tossed umbrellas and rain clogs and wondering what it must be like in Pittsburgh on a day like this (because I have just returned from there) and remembering another rainy day a long time ago in Lucerne (a very different city) where I learned something about umbrella etiquette and the art of ducking in and out of tiny, cramped shops without making a puddle on the floor.