Mr Utterson decides he will "remain behind after all others had departed" from UItterson's gathering of his friends. He is hoping to find out information about Mr Hyde. His "all intelligent" technique should help him find out some insight on Mr Hyde as he thinks Jekyll is in danger.
Utterson begins talking to Jekyll and Jekyll immediately says he has never seen "a man so distressed" to try and get Utterson away from the case with Mr Hyde. This also shows Utterson's change of character since he has taken up the case.
Later in the conversation, we see Jekyll begin worrying because he knows Utterson will eventually find out about his secret and we see hints of Hyde taking control of him when he changes his tone of voice when he "trifle sharply."
We begin to see even more foreshadowing when "Dr Jekyll grew pale to the very lips, and there became a blackness in his eyes. This foreshadows Hyde is taking more control as his "handsome face" turns. Mr Utterson tries to find out more as he begins to thionk Jekyll is hiding something when he tells Jekyll "I am a man to be trusted."
Jekyll tells Utterson that "it isn't what you fancy" to try and get Utterson to drop the case but as a reader we know it foreshadows that Utterson doesn't actually know everything. Jekyll at this stage thinks he can "be rid of Mr Hyde" yet we know he can't. We know he isn't going to tell Utterson as it is "a private matter."
Jekyll is panicking at the end of the conversation, he lies when he says he fears Mr Hyde was rude to Mr Utterson yet he knows this, as it was him. He describes Mr Hyde as a "young man" enforcing the lies. The conversation becomes unconfortable when Jekyll begins to "plead." We then see some epic foreshadowing when Jekyll says "when I am no longer here" as in he knows Hyde will take over.