Returning to the Tavistock Clinic Bion chaired the Planning Committee that reorganized the Tavistock into the new Tavistock Institute of Human Relations, alongside a new Tavistock Clinic which was part of the newly launched National Health Service. As his interest in psychoanalysis increased, he underwent training analysis, between 1946 and 1952, with Melanie Klein. He met his second wife, Francesca, at the Tavistock in 1951. He joined a research group of Klein's students (including Hanna Segal and Herbert Rosenfeld), who were developing Klein's theory of the paranoid-schizoid and the depressive positions, for use in the analysis of patients with psychotic disorders. He produced a series of highly original and influential papers (collected as ""Second Thoughts"", 1967) on the analysis of schizophrenia, and the specifically cognitive, perceptual, and identity problems of such patients. To this he added a valuable final section called Commentary, showing how some of his views on clinical and theoretical matters had changed.