‘The Grid’ and ‘Caesura’ were based on talks given at meetings of the Los Angeles Psychoanalytic Society in April 1971 and June 1975, respectively. Two Papers: The Grid and Cæsura was first published in 1977 by Imago Editora, Rio de Janeiro. A revised and corrected edition was published in 1989 by Karnac Books, London, by arrangement with Francesca Bion and Mark Paterson.