Chapter Six: Tweedledee and Tweedledum (Janusian Reality)

Through The Looking-Glass EXPLAINED

All of a sudden, Alice hears a loud puffing like the sound of a steam engine. She soon finds out where the sound is coming from; it's coming the Red King himself.

When Tweedledee and Tweedledum explain to Alice that she is a figment of the Red King's dreamy Imagination, she begins to cry.