Christie peppers chapters 1 and 2 of And Then There Were None with foreshadowing comments and thoughts, some of them ironic. For example, in chapter 1, Lombard recalls Isaac Morris, the man who hired him to go to the island. Morris said, "There you will hold yourself at the disposal of my client." To be at someone's disposal means to do his bidding, yet the word "disposal" also means "to get rid of," which is what Justice Wargrave does to Lombard.
In chapter 2, Dr. Armstrong reflects on how much he needs this vacation. He says to himself, "I'll imagine to myself that I'm not going back." He thinks an island lends itself to being "a world of its own. A world, perhaps, from which you might never return." Of course, Armstrong never returns from the island because he dies there.
Both Vera and Wargrave think about Mrs. Rogers in ways that predict her death. Vera thinks, "She looked like a woman who walked in mortal fear," and Wargrave thinks she looks "scared to death." Mrs. Rogers proves to be quite mortal and is one of the first to die.
Two powerful examples of foreshadowing are the "Ten Little Indians" rhyme that Vera reads when she finds it posted over the fireplace and the scripture Miss Brent reads to herself. The poem foreshadows how all ten guests will meet their deaths. The scripture foreshadows that the guests all have performed the "crimes" for which they are about to be punished; their feet are about to be taken in their own nets.