<P> Stevenson never says exactly what Hyde does on his nightly forays, generally saying that it is something of an evil and lustful nature . Thus, in the context of the times, it is abhorrent to Victorian religious morality . Hyde may have been reveling in activities such as engaging with prostitutes or burglary . However, it is Hyde's violent activities that seem to give him the most thrills, driving him to attack and murder Sir Danvers Carew without apparent reason, making him a hunted outlaw throughout England . </P> <P> A lawyer named Gabriel Utterson and Jekyll's butler, Mr. Poole, end up breaking into Jekyll's lab . Inside, they find the body of Hyde wearing Jekyll's clothes and apparently dead from suicide . They find also a letter from Jekyll to Utterson promising to explain the entire mystery . Utterson takes the document home where he first reads Lanyon's letter and then Jekyll's . The first reveals that Lanyon's deterioration and eventual death resulted from the shock of seeing Hyde drinking a serum or potion and as a result of doing so, turning into Jekyll . The second letter explains that Jekyll, having previously indulged unstated vices (and with it the fear that discovery would lead to his losing his social position) found a way to transform himself and thereby indulge his vices without fear of detection . But Jekyll's transformed personality, Hyde, was effectively a sociopath--evil, self - indulgent, and utterly uncaring to anyone but himself . Initially, Jekyll was able to control the transformations, but eventually he would become Hyde involuntarily in his sleep . </P> <P> At this point, Jekyll resolved to cease becoming Hyde . One night, however, the urge gripped him too strongly, and after the transformation he immediately rushed out and violently killed Carew . Horrified, Jekyll tried more adamantly to stop the transformations, and for a time he proved successful by engaging in philanthropic work . One day, at a park, he considered how good a person that he had become as a result of his deeds (in comparison to others), believing himself redeemed . However, before he completed his line of thought, he looked down at his hands and realized that he had suddenly transformed once again into Hyde . This was the first time that an involuntary metamorphosis had happened in waking hours . Far from his laboratory and hunted by the police as a murderer, Hyde needed help to avoid being caught . He wrote to Lanyon (in Jekyll's hand), asking his friend to retrieve the contents of a cabinet in his laboratory and to meet him at midnight at Lanyon's home in Cavendish Square . In Lanyon's presence, Hyde mixed the potion and transformed back to Jekyll . The shock of the sight instigated Lanyon's deterioration and death . Meanwhile, Jekyll returned to his home only to find himself ever more helpless and trapped as the transformations increased in frequency and necessitated even larger doses of potion in order to reverse them . It was the onset of one of these spontaneous metamorphoses that caused Jekyll to slam his laboratory window shut in the middle of his conversation with Enfield and Utterson . </P> <P> Eventually, the stock of ingredients from which Jekyll had been preparing the potion ran low, and subsequent batches prepared by Dr. Jekyll from renewed stocks failed to produce the transformation . Jekyll speculated that the one essential ingredient that made the original potion work (a salt) must have itself been contaminated . After sending Poole to one chemist after another to purchase the salt that was running low only to find it wouldn't work, he assumed that subsequent supplies all lacked the essential ingredient that made the potion successful for his experiments . His ability to change back from Hyde into Jekyll had slowly vanished in consequence . Jekyll wrote that even as he composed his letter, he knew that he would soon become Hyde permanently, having used the last of this salt and he wondered if Hyde would face execution for his crimes or choose to kill himself . Jekyll noted that, in either case, the end of his letter marked the end of his life . He ended the letter saying, "I bring the life of that unhappy Henry Jekyll to an end". With these words, both the document and the novella come to a close . </P>

Where was dr. jekyll when he first transformed into mr. hyde without drinking the potion