That we know what Wittgenstein wrote is in more than one respect largely due to the efforts of Georg Henrik von Wright. He is, as one of Wittgenstein's heirs as well as one of the editors or co-editors of several volumes containing Wittgenstein's writings, responsible for the format in which we read Wittgenstein. He has, as generous provider and observant keeper of what he himself modestly likes to call the "Wittgenstein Materials' at the Helsinki Department of Philosophy, helped many interested students and scholars to consult copies of Wittgenstein's writings and other materials relevant to understanding Wittgenstein's work. And he has, as the author of a catalogue of the Wittgenstein papers and several painstaking and at the same time eminently readable studies of the origins of the Tractatus Logico-Philosophicus and the Philosophical Investigations, made us familiar with the astonishing volume of Wittgenstein's literary Nachlaß and the background of the two books which made Wittgenstein's name famous.¹