On the final night of the cruise, the crew and most of the guests go to a party on the shore, but Philip, who brought no money, remains on the ship. Tom returns to find him thinking over loose ends of the earlier events. Philip experiments with stamping out cigarettes, speculating that it was Clinton who attempted to stamp out the cigarette but was unable to in the dark. This further implies that he only had one try at it; Philip posits that, while he looked down and tried to put it out, the killer murdered him. Lee could not have killed him in this way, and therefore Philip suspects that Lee had "killed" a dead body. He further speculates that someone else – presumably the actual killer – stayed there after Lee fled and rearranged the scene to implicate her instead. Finally, Philip realizes that the six clues (Shoplifter, Homosexual, Ex-convict, etc.) spell out "SHEILA", and that a picture taken the first day has each of them standing under a letter of Sheila's name that corresponds to their clue – except for the final "A", which breaks the pattern. (The use of the acronym also explains the redundant "LITTLE" in Philip's own clue; "CHILD MOLESTER" would have divulged Philip's secret guilt well enough, but the "L" from "LITTLE" was necessary for the photograph.)