Douay-Rheims Bible 1 AMEN, amen I say to you: He that entereth not by the door into the sheepfold, but climbeth up another way, the same is a thief and a robber. 2 But he that entereth in by the door is the shepherd of the sheep. 3 To him the porter openeth; and the sheep hear his voice: and he calleth his own sheep by name, and leadeth them out. 4 And when he hath let out his own sheep, he goeth before them: and the sheep follow him, because they know his voice. 5 But a stranger they follow not, but fly from him, because they know not the voice of strangers. 6 This proverb Jesus spoke to them. But they understood not what he spoke to them.
Eventually, the stock of ingredients from which Dr. Jekyll had been preparing the potion ran low, and subsequent batches prepared by Dr. Jekyll from renewed stocks failed to produce the transformation. Dr. 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 Mr. Hyde into Dr. Jekyll had slowly vanished in consequence. Jekyll wrote that even as he composed his letter, he knew that he would soon become Mr. Hyde permanently, having used the last of this salt and he wondered if Mr. 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 the life of Dr. Jekyll. 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.
Richard Enfield is Utterson's cousin and is a well known "man about town." He first sees Hyde at about three in the morning in an episode that is well documented as Hyde is running over a little girl. He is the person who mentions to Utterson the actual personality of Jekyll's friend, Hyde. Enfield witnessed Hyde running over a little girl in the street recklessly, and the group of witnesses, with the girl's parents and other residents, force Hyde into writing a cheque for the girl's family. Enfield discovers that Jekyll signed the cheque, which is genuine. He says that Hyde is disgusting looking but finds himself stumped when asked to describe the man.