Final answer:
The provided text does not include any information about Madame de Villefort's discovery after returning to the room where Valentine's body was found. Instead, it describes various scenarios from different literature pieces involving themes of shock, discovery, and emotion.
Step-by-step explanation:
The question seems to be referencing an event that occurred in a novel, yet no specific novel or situation from Madame de Villefort's perspective after the nurse found Valentine's body is provided in the information you've shared. From the details included, it appears that there are multiple scenarios involving shock, discovery, and intense emotion—common themes in literature.
One involves a character who replaces a letter with a facsimile, another who is paralyzed at the sight of soldiers, a third who sees a fading crimson hand in the mirror, and yet another who experiences the illusory return to a loved one before facing a shocking truth.
Furthermore, a passage describes the unexpected return of a presumed-dead husband, and another depicts the decision to preserve a deceased's body due to unusual circumstances. These scenes are rich in thematic content such as deception, war, personal transformation, the impermanence of life, and the macabre.