 Amberiotis later learned of this chance encounter and Blunt's past when he meets Mabelle, and used this knowledge to blackmail Blunt.Blunt learned by chance that Amberiotis had become a new patient of Morley's, so he and Gerda decided to take advantage of his dental appointment to murder him.The morning of the murder, Gerda invited Mabelle to an apartment she secured under the alias of Mrs. Chapman and killed her to steal her identity.