1. The photograph of Eva Smith: A central prop, the photograph represents the young woman who committed suicide due to the actions of the Birling family. It serves as a constant reminder of the play's tragic events.
2. The mantelpiece: The mantelpiece of the Birlings' home plays an essential role in conveying time passing throughout the play. It's adorned with objects that change as the evening progresses.
3. The decanter of port wine: The decanter of port wine symbolizes the luxurious lifestyle of the Birlings and their social gatherings. It appears throughout the play, representing their social rituals.
4. The inspector's notebook and pencil: These simple objects signify the inspector's investigative nature. They highlight his authority as he probes the Birlings' lives and reveals the truth behind Eva Smith's death.
5. The jewelry box: Gifted by Gerald Croft to Eva Smith, this jewelry box becomes a pivotal piece of evidence connecting Gerald to Eva. Its discovery deepens the mystery surrounding Eva's death.
6. Sheila Birling's engagement ring: This ring reflects Sheila's transformation throughout the play. Initially proud of her wealth, she begins questioning her privilege after learning about Eva's struggles.
7. Eric Birling's cigarette case: Eric's cigarette case symbolizes his recklessness and youthful defiance. It serves as a reminder of his irresponsible actions and his role in Eva's downfall.
8. Sybil Birling's fur coat: Sybil's fur coat highlights her superficial nature and obsession with appearances. It further emphasizes the Birlings' materialistic values.
9. The police telephone: The police telephone ringing repeatedly throughout the play signals the arrival of Inspector Goole and the impending revelations. It creates an atmosphere of suspense and anticipation.
10. Inspector Goole's visiting card: Goole's visiting card, upon which his real name is revealed, adds a surprising twist to the play. It suggests his identity as a symbol of conscience rather than a real police officer.
11. The mirror: The mirror on the mantelpiece reflects the Birlings' self-perception and their moral decline. It serves as a powerful symbol, underscoring their vanity and the need for self-reflection.
These props, when used effectively in the production of "An Inspector Calls," contribute to the play's setting, characterization, and thematic development, enhancing the overall theatrical experience.