Charles Travis received a BA in philosophy from Berkeley and a PhD from UCLA. His last three positions have been at the University of Stirling, Northwestern University and King’s College London. He has had visiting appointments at, most notably, the University of Michigan and Harvard, and, recently, as a visiting researcher at the University of Sydeney. He has also lectured in the Collège de France. He now lives in Portugal (Lavra) where he (mostly) writes, but is also co-organiser of a project, “The Bounds of Judgement”, of the Mind Language and Action research group of the Institute of Philosophy of the University of Porto. In the beginning he wrote on philosophy of language, and is liable to do so again. At present he works primarily on Frege, Wittgenstein, philosophy of perception and philosophy of psychology. He is currently working on a book on Frege, to be titled: Frege: The Invisible Realm.