Deception of the Senses

The plot relies on sensory misdirection—such as the coldness of a body that isn't dead, the sound of shots that aren't heard, and the use of dust as a disguise—to keep both the characters and the reader uncertain about what truly happened.

Valcour notes the clean balcony and lack of clues, but the dirty soap and missing button suggest hidden evidence, challenging initial perceptions.

Valcour's discovery of dust streaks suggests the attacker used dust to disguise their identity, deceiving the senses.

Valcour misinterprets Mrs. Siddons's reactions, and the medical examiner's cryptic 'crinoline' hints at misleading clues.

The stillness and apparent calm of the house contrast with the underlying threat, and the characters' perceptions are unreliable.