"The Strange Case of Dr. Jekyll and Mr. Hyde" by Robert Louise Stevenson tells the story of a doctor Dr. Henry Jekyll and his alternate personality Mr. Edward Hyde. In personality, Dr. Jekyll is a good man with compassion while Mr. Hyde is the exact opposite. He is a monster who eventually takes control of the doctor and murders people. Realizing his inability to keep Mr. Hyde under control and also unable to timely metamorphose, Dr. Jekyll decided to commit sui cide by poisoning himself. In the chapter "The Last Night", when Poole and Utterson discovered the body of Dr. Jekyll, they also found alongside him "<em>crushed phial in the hand and the strong smell of kernels</em>", the source of the poison. The kernels of nuts are the source of cyanide, a poisonous chemical that will kill the person within minutes. The choice of this poison is also significant in that Dr. Jekyll doesn't want Mr. Hyde to emerge before he dies. Because if he did metamorphose into My. Hyde, he will tear the letter and no one will come to know of the truth.