Patricia Herzog takes up the question of how Freud dealt with the distinction between what is conscious and what is unconscious in the dynamic sense, that is, inadmissible to consciousness. The author begins her exegesis with Freud's earliest writings and follows the fate of such concepts as pathological defense, perception, consciousness, and unconsciousness through to the “Outline” (Freud, 1938). Herzog includes and places great importance on some material Freud never offered for publication, namely the “Project” (Freud, 1895) and the letters to Fliess (Freud, 1892-1899). She finds that Freud was inconsistent and self-contradictory throughout the evolution of his ideas about consciousness and that he ultimately failed to provide an internally consistent account of consciousness, unconsciousness, and related concepts. Finally, she