A Philosopher writes a book about ontology and the philosophy of language. That is, the first parts of his book talk explicitly about ontology; the latter parts, explicitly about language. And there are some propositions which are about both. It is a difficult book, and would-be commentators cast about for some way to approach it. In most cases, they will resolve their quandaries by plunging in at the beginning and doggedly making their respective ways to the end. But some may notice that the book as a whole is dominated by one key idea. And that, in turn, may lead them to reflect that perhaps it might prove more edifying to begin with language.