The voyeuristic imagery which Freud uses in describing his feelings on the Acropolis is interpreted as a déjà vu, connected with a childhood memory of having seen his mother nude. The Letter is further seen as another indication of Freud's greater attention, especially in the last years of his life, to the preoedipal phase. This is also evident in his increasing examination of the prehistory and myth of Egypt, Greece, and other places. To some degree, the Oedipal and patriarchal considerations are also introduced in the Letter. Thus Freud's disturbance of memory may also be connected with having forgotten that it was Fliess who brought to his attention the idea of bisexuality.