The handwriting expert's observation that links Jekyll to Hyde, deepening the mystery.
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The Handwriting Comparison
The Handwriting Comparison
A Clerk's Expertise
Mr. Guest is Utterson's head clerk and a connoisseur of handwriting. He examines Hyde's letter and Jekyll's invitation, side by side.
The Resemblance
He points out that the two hands are nearly identical, only differently sloped. The implication is that one person wrote both.
The Silence Kept
Utterson tells Guest to keep quiet about the discovery. But the knowledge is now in Utterson's hands. He realizes that Jekyll may have forged the letter for a murderer.