Martha Harris (1919-1987) was one of the most influential and also one of the most loved psychoanalysts of the generation that trained with Melanie Klein. She also worked with Wilfred Bion, and wrote many books and papers on psychoanalytic training and child development. Her colleague James Gammill cites Mrs Klein as saying: "She is one of the best people I have ever known for the psychoanalysis of children ... and she has a mind of her own." Harris was responsible for the child psychotherapy training at the Tavistock Clinic from 1960 onwards, developing laterally the method founded on infant observation that had been put in place by Esther Bick. She established cross-clinic work discussion groups, a pioneering schools' counselling course (in collaboration with her husband Roland Harris), and individual work with disturbed children in the school environment. Her belief that psychoanalytic ideas could and should "travel", both geographically and across the professions, led to her seeding the "Tavi Model" in many other countries through regular teaching trips, in company with her later husband Donald Meltzer.Her influence was not as a theorist, but as a teacher with an extraordinary capacity to engage processes of introjective learning in both students and readers. This tribute by some of those who studied with her is not simply testimony to a remarkable teacher and clinician whose wisdom has been rarely equalled; it also offers inspiration to others who may be struggling to find ways of using psychoanalytic ideas imaginatively in a variety of contexts - clinical, social or scholarly - in what can at times appear to be an unreceptive world.