Final answer:
In the story "Poison," a discovery is made in Harry Pope's bedroom when the sheet is removed from his bed. The wall-paper in his bedroom is torn off, scratched, and gouged, and the bed looks damaged. The protagonist suspects that others are affected by the wallpaper.
Step-by-step explanation:
In the story "Poison," when the sheet is removed from Harry Pope's bed, a discovery is made in his bedroom. The discovery is that the wall-paper in his bedroom is torn off in spots, scratched and gouged, and the plaster itself is dug out here and there. The bed, which is the only furniture in the room, looks like it has been through a lot. The protagonist suspects that the people around him, including his wife and sister-in-law, are secretly affected by the wallpaper.