Question

For what has he been caught?
in the story of the blue carbuncle

Answer 1

Answer:

During the preparation of the bird for cooking, Mrs Peterson had discovered a blue diamond in the throat of the goose. This blue diamond is the Blue Carbuncle, a precious stone that is being reported as being stolen from the hotel room of the Countess of Morcar

Explanation:

Answer 2

Answer:

Holmes explains that Peterson, the commissionaire, brought it on Christmas morning. ... Holmes identifies it as the blue carbuncle stolen from the Countess of Morcar's hotel room five days ago. A plumber with a previous robbery conviction named John Horner has been arrested on evidence from James Ryder, head attendant.