As the others search for “Mr. Owen,” the narrator notes, “If this had been an old house, with creaking wood, and dark shadows, and heavily paneled walls, there might have been an eerie feeling. But this house was the essence of modernity. There were no dark corners—no possible sliding panels—it was flooded with electric light—everything was new and bright and shining. There was nothing hidden in this house, nothing concealed. It had no atmosphere about it. Somehow, that was the most frightening thing of all.” As the narrator notes, nothing can be hidden in this house, especially the guilt of all the guests who inhabit it. The manner of death Wargrave chooses for himself is also symbolic, and he uses it as a clue to the real identity of the murderer on the island. He arranges to shoot himself in his forehead, the first time as a trick and the second time for real. In his confession, he notes that the mark in his head is symbolic of the “brand of Cain.”
Foreshadowing occurs when an old man sitting across from Blore on the train warns, “there’s a squall ahead … Watch and pray…. The day of judgment is at hand.” A squall will hit the island, literally and figuratively, and judgment will be pronounced and acted upon.