Edgar Allen Poe question, please help!?

i want to read this story but i dont know what its called.its about a person who is in a prison due to false charges, he is very hungry and sleepy and every time he wakes he is given bread and a pitcher of water. one day the water is drugged and he falls into a deep sleep then he is tied down and some sort of bladed pendulum thing kills him do you know the name to this story