What is the conclusion of "The Pit and the Pendulum"?

The conclusion of Edgar Allen Poe's short story, "The Pit and the Pendulum", reveals that the narrator is freed by the French army, lead by General LaSalle, as it captures the city of Toledo. This denouement comes after the protagonist has been tortured for some time by the Spanish Inquisition.

The narrator, unnamed throughout the story, accidentally discovers a deep, circular pit early in the tale. His final torment is one where the walls of his prison, through unexplained means, are heated and pushed inward, forcing him towards the chasm. He nearly succumbs, when "the fiery walls rushed back" and an "outstretched arm" catches his own as he falls. His rescuer is General LaSalle of the French army.