Which three sentences reflect Mr. Utterson's loyalty and protective instinct toward his friend Dr. Jekyll?

Strange Case of Dr. Jekyll and Mr. Hyde
by Robert Louis Stevenson (excerpt)

"I should like to hear your views on that," replied Utterson. "I have a document here in his handwriting; it is between ourselves, for I scarce know what to do about it; it is an ugly business at the best. But there it is; quite in your way a murderer's autograph."

Guest's eyes brightened, and he sat down at once and studied it with passion. "No, sir," he said: "not mad; but it is an odd hand." "And by all accounts a very odd writer," added the lawyer.

Just then the servant entered with a note. "Is that from Dr. Jekyll, sir?" inquired the clerk. "I thought I knew the writing. Anything private, Mr. Utterson?" "Only an invitation to dinner. Why? Do you want to see it?"

"One moment. I thank you, sir"; and the clerk laid the two sheets of paper alongside and sedulously compared their contents. "Thank you, sir," he said at last, returning both; "it's a very interesting autograph."

There was a pause, during which Mr. Utterson struggled with himself. "Why did you compare them, Guest?" he inquired suddenly.