he attractive daughter of a local crank who disowned her when she married against his wishes. Subsequently abandoned by her husband, she turns to Stapleton and Sir Charles Baskerville for help, with fatal consequences for the latter. Laura Lyons when confronted by Sherlock Holmes and is furnished with the truth about Stapleton, who had been using her, comes up with the truth that she had been keeping a secret, which however helps a lot in joining the missing links of the mystery.