Through the training analysis, each psychoanalyst becomes part of a genealogy that ultimately goes back to Sigmund Freud and a handful of early pioneers. Evidently, each training and supervising analyst has her or his own theoretical and practical preferences, with which the analysands are confronted and by which they are deeply influenced. 1 Whatever the advantages or shortcomings of this method may be, the point is that a history of ideas in psychoanalysis must take account of the path these ideas have taken. Exploring that path of transmission of theoretical and technical concepts thus becomes a via regia for the historical investigator.