The Lost Duchess by Anonymous - Audiobook

The Duke of Datchet is stressing out over a visit from the Prince of Wales when he receives very strange news: his duchess has disappeared! The duke is more irritated than anything, until he's presented with a note in his wife's handwriting along with a lock of her hair. It turns out the duchess has been kidnapped! The kidnappers demand 500 pounds in gold before 5:30 PM, or they'll send the duke the duchess' little finger. And if that doesn't work, "Other portions of her grace will follow."