The world is endlessly fascinating, countlessly full of interesting people. Once at a party long ago I met a visitor to Guyana who turned out to be an expert on grasshoppers. He was a great enthusiast and I spent an hour talking to him about grasshoppers around the world and could easily have spent another day or a week on the subject. I did not know, until he told me, how full the world is of grasshoppers – green and gold and brown and black and red even, some inches large and some dot-like small, with a thousand sounds and songs and habits of their own. If you should cut down one of your great forest trees, he told me, in the branches of the crown,
