There is no clue of how the man entered the upper floor apartment.
Perhaps through the bedroom's window which is, however, at some distance from the ground.
Poirot finds a frozen leg of mutton which interests him very much.
Poirot hypothesizes that the murderer was a young man who came in a trap, killed Whalley, and went away. Poirot talks to Grant and asks him whether he entered the room twice to take the jade figures.
Deciding there is a case waiting for him in England, Poirot aborts his trip. An uninvited man arrives, claiming to work for a lunatic asylum and to be in search of an escaped inmate.The structure of the novel is different from other Poirot stories, as it began from twelve short stories (eleven in the US) that had been separately published.This is a tale of international intrigue and espionage, therefore opening up the possibility of more spy fiction from Christie.In the aftermath many crooks were rounded up, who referred to the Big Four.The latter have produced a form of wireless energy capable of focusing a beam of great intensity on any spot.Number 3 is a Frenchwoman, and Number 4 is the destroyer and otherwise unknown.Poirot and Hastings leave the man in the care of Poirot's housekeeper and set off to catch a train to Southampton.He identifies the dead man as the escapee in question, then departs.Poirot calls the asylum and learns that there have been no recent escapes.There is then a visit to an unnamed village in Devon, situated in the vicinity of Dartmoor.The village of Chobham which Poirot visits next is an actual location in Surrey.