8. Doing so they find Hyde's body and a letter written by Dr Jekyll to Utterson
9. Lanyon's letter says that Hyde came to his house and then drank a potion which caused him to transform into Jekyll
10. Jekyll's letter contains his confessions that he developed a drug which caused him to transform into Hyde, and evil side
11. He then found himself unable to turn back and loosing control
12. running out of original drug which he could not recreate
13. He knows that after writing the letter he would no longer be able to turn back into Jekyll