Black beauty

The puzzles and challenges are manifested in the Chawkum Old Bliss Birchchire, where the young dowry Shuskum Prince is racing in an important race, and strange behaviors appear for Mr. Robert Norberton and Mrs. Beatrice Valder. John Mason, the skilled coach of horses, sends an urgent request to Holmes to reveal the truth behind these mysterious behavior. What happens in this house? What is the sec...