I have found it impossible to interpret the material presented me by these patients as a manifestation of purely psychological development divorced from any concurrent physical development. I have wondered whether the psychological development was bound up with the development of ocular control in the same way that problems of development linked with oral aggression co-exist with the eruption of teeth. If this is so, we would have to ask ourselves if these psychological developments, ushering in the Oedipus complex,come close to the first four months in the individual’s life. The relevance of this to assessment of the correctness or otherwise of Mrs Klein’s view of the earliness of the oedipal phase is obvious; if the experience of other observers appears to confirm my impressions, itmay provide incidental reasons for favouring an early date for the pre-oedipal phase.