The short story The Tell Tale Heart written by Edgar Allan Poe and respectively the play A Street Car Named Desire, written by Tennessee Williams portrays the notion of discovery through the use of a variety of techniques. These techniques aids us in the discovery of the narrators obsession with killing the man, the narrator's insanity and guilt in the murder of the person and the narrator's scrupulous behaviour in the act of suffocating the man.
             Poe uses techniques such as descriptive language, first person narrative, and flashback to convey the notion of discovery.
             Poe uses the technique 'flashback" to narrate the whole story to the audience. Through this technique we discover that the Narrator is talking about his past, he has already killed the old man. This adds to the notion of the narrator's insanity and guilt, "the disease sharpened my senses, not destroyed, not dulled them."
             Likewise Blanche continuously lives the flashback of her first husband's death. This flash back occurs every time her mind descends into insanity, this also helps in the notion of her extreme guilt, she feels responsible for the death of her husband, on the other hand the narrator in The Tell Tale Heart, knows he is guilty but constantly replays the incident in his mind.
             Poe presents the obsession of the Narrator in great descriptive detail. Through the use of this quote we can discover that he was very meticulous about how he would eventually kill the old man, "It took me a whole hour to place my whole head within the opening so far that I could see him as he lay upon his bed." He designed his plan cautiously and extensively, thus proving his obsession with "the evil eye". Again this proves his mental insanity.
             Blanche is also obsessed with her appearance. So much so that she cover herself in dark lights so as people would not see that she is ageing. Also she tells Stella when they ...