Ludwig Wittgenstein, we are told, left a collection of fragments in a box-file, most of them cut from typescripts dictated from 1945 to 1948. Some years ago Professor Geach made an arrangement of this material, which the editors, Professor G. H. von Wright and Miss G. E. M. Anscombe have retained with a very few alterations.¹ There are 717 numbered propositions. Many of the issues discussed are ones raised in Wittgenstein's Philosophische Bemerkungen, Blue and Brown Books, and Philosophical Investigations. The editors have supplied some footnote cross-references to the Bemerkungen and the Investigations, but none to the Blue and Brown Books.