This is a revised and expanded edition of the collected papers of Martha Harris and Esther Bick on child development, infant observation and psychoanalytic training, including some not in previous editions. These papers from their clinical, observational and educational  perspectives, form the basis for what has become known worldwide as the ‘Tavistock Model’ of educating child psychotherapists: a model which also enriches psychoanalysis with adults. The collection includes appendices by Ann Cebon and Margaret Rustin and on the genesis of the Schools’ Counsellors’ Course developed at the Tavistock by Roland and Martha Harris.