PATHOLOGY

Detailed explanation-1: -The narrator emphasizes the careful calculation of the murder, attempting the perfect crime, complete with dismembering the body in the bathtub and hiding it under the floorboards. Ultimately, the narrator’s actions result in hearing a thumping sound, which the narrator interprets as the dead man’s beating heart.

Detailed explanation-2: -The first-person narrator claims to hear the old man’s heart beating, a sound that drives him to finally kill the old man. The narrator describes his own anger of the sound, giving readers an awareness of his thinking and emotions that they would not otherwise have.

Detailed explanation-3: –now, I say, there came to my ears a low, dull, quick sound, such as a watch makes when enveloped in cotton. I knew that sound well, too. It was the beating of the old man’s heart.