 In 1951, Herbert Feigl approached Paul Schilpp, the editor of the Library of Living Philosophers, about doing a volume not on a particular philosopher, but on logical empiricism as a movement. Carnap and Reichenbach were to be in the foreground, as representative figures for the movement as a whole. Schilpp was sufficiently interested that he persisted with the idea even after Reichenbach’s sudden death in 1953; the volume was now to be focused on Carnap alone. Carnap invested a great deal of time in the project. He took the task of writing an autobiography seriously, reviewing many of his old papers, including his extensive diaries, in preparation for it. The resulting autobiography was much too long, and had to be cut by a third before publication. (The cut portions are available at the Young Research Library, University of California at Los Angeles, Special Collections, Collection 1029 (Rudolf Carnap), Box 2, CM3, mostly in folder marked “M-A5”; extensive quotations and references can be found in Carus 2007a.)