BL Translated from German with additions and amendments The writings preserved in Wittgenstein's manuscripts from 1945 to 1949, after he had completed the first part of Philosophical Investigations, chiefly concern the nature of certain psychological concepts. Joachim Schulte here uses these manuscripts - not just the selections from them published so far - as a basis for reconstructing the central arguments and conceptual elucidations developed by Wittgenstein during that period.