The tone is one of fear.
intimidated
Dr. Jekylls butler
he works in a bakery.
poole told mr utterson that dr jekylle had gone into seclution
Jekyll did not necessairly intend to create another personality inside himself. What he was trying to do is prove the his formula, HJ7, could eliminate all evil from someones personality but that backfired and brought out Jekylls evil side, Hyde.
Dr. Jekyll turns completely evil as Mr. Hyde because the potion he consumes brings out his deepest suppressed desires and impulses. Jekyll's attempt to separate his good and evil sides resulted in Hyde becoming increasingly dominant, leading to Jekyll losing control over his transformation.
Enfield tells Utterson the story of how he witnessed Mr. Hyde trample a young girl in the street and then disappear into the door of Dr. Jekyll's house. This incident serves as the first indication to the characters in the book of the connection between Dr. Jekyll and Mr. Hyde.