One of the signs of advancing age in the American college professor is a tendency for him to write less and publish more. This seeming paradox is easily explained by the phenomenon of Collected Works, that is, by what on television would be described as reruns. As in television, no great public outcry is needed to bring forth the reruns; a question from his wife, a polite suggestion from a colleague, and the cut-and-paste operation is under way.I have put together here what I believe to be the best of the rather meager output of my professional career up to this point. For reasons (mostly financial) that always seemed adequate...