His evil self became Edward Hyde, and in this disguise, he was able to practice whatever shameful depravities he wished, without feeling the shame that Dr. Jekyll would feel. Recognizing his two "selves," Jekyll felt the need of providing for, and protecting, Edward Hyde. Therefore, he furnished a house in Soho, hired a discreet and unscrupulous housekeeper, and announced to his servants that Mr. Hyde was to have full access and liberty of Jekyll's residence and, finally, he drew up a will leaving all of his inheritance to Edward Hyde. Thus, this double life continued until the murder of Sir Danvers Carew by Edward Hyde.
This horrible revelation caused Jekyll to make a serious attempt to cast off his evil side — that is, Edward Hyde — and for some time, he sought out the companionship of his old friends. However, the Edward Hyde side of his nature kept struggling to be recognized, and one sunny day while sitting in Regent's Park, he was suddenly transformed into Edward Hyde. It was at this time that he sought the help of his friend Dr. Lanyon. He hid in a hotel and wrote a letter asking Dr. Lanyon to go to the laboratory in his house and fetch certain drugs to Lanyon's house. There, Hyde drank the potion described in Lanyon's letter. The drug caused him to change to Dr. Jekyll, while Dr. Lanyon watched the transformation in utter horror.
After awhile, Edward Hyde almost totally occupied Jekyll's nature, and the original drug was no longer effective to return Hyde to Jekyll. After having Poole search throughout London for the necessary "powder," Jekyll realized that his original compound must have possessed some impurity which cannot now be duplicated. In despair at being forced to live the rest of his life as Hyde, he commits suicide at the moment that Utterson and Poole are breaking down the laboratory door.
