Laura Lyons’s Letter
The Hound of the BaskervillesThis subplot follows the letter that places Sir Charles at the gate and reveals how Stapleton manipulates Laura Lyons into serving his murder plan.
increasing
Bearing strength in each event
decreasing
The Appointment

The Appointment
A private request
Laura Lyons writes to Sir Charles asking him to meet her at the gate at ten o’clock.
A plea to destroy the letter
Her postscript asks him to burn it, protecting a sensitive personal matter.
The appointment later becomes a crucial link in the death.
A Charred Postscript

A Charred Postscript
A household discovery
Eliza finds the burned remains of a letter in Sir Charles’s study.
Initials recovered
Only the postscript and the initials L. L. remain legible.
The fragment points Watson toward a woman connected to Coombe Tracey.
Watson’s Interview

Watson’s Interview
Denial under pressure
Watson questions Laura Lyons, who first denies writing to Sir Charles that day.
A partial admission
She acknowledges the appointment but says she never attended because another source offered help.
Her account is plausible but incomplete.
Stapleton’s Manipulation

Stapleton’s Manipulation
A false promise
Holmes reveals that Stapleton dictated the letter and discouraged Laura from keeping the appointment.
An engineered absence
He used her need for divorce funds to bring Sir Charles to the gate while ensuring she would not appear.
The apparent coincidence was a constructed trap.
Laura Turns Witness

Laura Turns Witness
Betrayal exposed
Laura learns that Stapleton is already married and had used her as a tool.
Truth released
She confirms his pressure and explains why she concealed the appointment.
Her testimony closes a central gap in the case.
The morning before Sir Charles dies
Weeks after the inquest
After Barrymore reveals the initials
When Holmes and Watson revisit Laura
During Holmes’s second interview with Laura