The Cabinetmaker's Wife prepared her trap for Understump. She emptied everything out of her bedroom so there would be no place for Understump to hide. Next, she gathered up her two sacks of flour and set them in the room. "Understump!" she called out, "I'm ready for you!"
     "What must I do?" The voice came from inside a chest she had removed from her room.
     "You must follow me into my bedroom. You must remain over the floor and under the ceiling, just as I will. And you must remain between the four walls, just as I will. And you must remain in the room with me until I leave it."
     Understump agreed to the terms and Atalaya was rather pleased with herself as she tucked her hair up under her night cap and entered the bedroom, closing the door behind her.
     There was no sign of the invisible fairy in the empty room, but that didn't worry her; that was why she'd brought the flour. She opened one sack and started tossing the fine, white powder around the room. "You can't hide from me, Understump," she said and she slowly covered the room in white. "With this flour on you I'll be able to see where you are, even if you are invisible." There was no sign of him yet, but she still had a sack of flour to spread around.
     "Don't think that you can avoid me, Understump," Atalaya called out. "Even if you avoid the flour I throw, you can't avoid the flour on the floor. I'll see your footprints and catch you in a moment."
     The room looked like it was covered in a blanket of snow and Atalaya was so covered with flour herself that she looked like a ghost. But there was still no sign of Understump. As still as can be, the Cabinetmaker's Wife looked around the room for anything that disturbed the flour. A little lump. A tiny cloud. But there was nothing.