'Clear and precise in its arguments, Finn's book draws illuminatingly on an impressive range of late nineteenth- and early twentieth-century sources, from medical treatises and theses, medical and cultural history to writers' correspondence, biography, literary fiction, reception studies and literary criticism. Finn has produced a book that enlivens our thinking and enriches our understanding of the place of pre-Freudian unconscious during a period when developments in medicine, psychology and psychiatry in France were informing and being reflected in creative writing of various sorts.' Adam Watt, University of Exeter