 SPOILER: A musician is mysteriously strangled by disembodied hands  after serenading Miss Froy under her hotel window. This is not one  of the films loose ends as previously reported. Froy uses a musical  code and the singer can be assumed to be passing information to  Froy. Note that Froy is carefully listening to the notes, not just  enjoying the serenade. The singer is an informant or another spy.