In a 1953 paper by Thomas A. Petty, the fall of Humpty Dumpty was "equated with the older child's feelings of having been displaced by the birth of a sibling and having irretrievably and disastrously fallen from a previously exalted position." Almansi further explores this theme and emphasizes the egg-nature of Humpty-Dumpty. In a clinical example, a screen memory of egg-breaking is related to both murderous impulses toward a sibling and the defense of passive dependency. The Annotated Mother Goose presents two explicit images for the Humpty Dumpty rhyme. In one we find the "classic anthropomorphic egg with a terrorized face in the act of falling," and the other "depicts a child … sitting on a very high wall … with a pensive, forlorn and sad facial expression." Almansi wonders if Humpty Dumpty represents a screen memory for an ill-fated birth. Fantasies of, and defenses against, the experience of birth may be associated with very early memory traces.