I had been stalking the bluebottle fly for five minutes, waiting for him to sit down. He didn't want to sit down. He just wanted to do wing-overs and sing the prologue to Pagliacci. I had the fly swatter poised in midair and I was all set. There was a patch of bright sunlight on the corner of the desk and I knew that sooner or later that was where he was going to light. But when he did, I didn't even see him at first. The buzzing stopped and there he was. And then the phone rang.