Terror by Night (1946)

Mary Forbes: Lady Margaret Carstairs

Quotes 

• Lady Margaret Carstairs : I shall report you both to Scotland Yard.

  Inspector Lestrade : ...But I *am* Scotland Yard.

• Lady Margaret Carstairs : [presenting her diamond]  My husband gave it to me on our fifth wedding anniversary.

  Sherlock Holmes : 423 carats, isn't it?

  Lady Margaret Carstairs : The original diamond was over 700 carats.

  Sherlock Holmes : Really?

  Lady Margaret Carstairs : [to her son]  Your father had it cut. Less ostentatious.

  Dr. John H. Watson : Less ostentatious? It's as big as a duck's egg.

• Sherlock Holmes : Thank you, Lady Margaret. We'll be as unobtrusive as possible.

  Lady Margaret Carstairs : That would be a novelty from a policeman.