For Leo, and by extension the audience, the violence of Mrs. Maudley's wrath, the discovery of Marian and Ted having sex, and the guilt he feels at Ted's death (all of which we observe in shorter and shorter moments, vanishing as a half-remembered childhood memory) culminates in the final scene as great tragedy not because all of this has ruined his life, but because his cry for rescue to Marian is answered only by another painful request: to once again fulfil his duties as a postman.
Christopher Small
October 17, 2013