... cried, "I congratulate you! This is a great discovery." "What is a great discovery?" "Why, that it was the coco and not the coffee that was poisoned. That explains everything! ... sort the ashes from the grate into the fender, handling them with the greatest caution. Suddenly, he gave a faint exclamation. " ;The forceps, Hastings!" I quickly handed them ... the lock of the purple despatch-case. It fitted, and he opened the box, but after a moment's hesitation, closed and relocked it, and slipped the bunch of keys, as well as the key that...