"'I turned and saw a blue domino about to enter Miss Morgan's dressing-room.'"
he rejoined, marking each point with a fresh and most complicated knot; "it was not he who bought the roses, therefore it was not he who, clad in a blue domino, entered Miss Morgan’s dressing-room directly after Knight left it.
"And mark the force of this point," he added excitedly. "Just before the curtain rang up for the second act, Miss Morgan had been in her room, and had then undone the packet, which, in her own words, was just as she had received it from Mr. Kidd's hands.
"After that Miss Knight remained in charge, and a mere ten seconds after she left the room she saw the blue domino carrying the roses at the door.
"The flower-girl's story and that of George Finch have proved that the blue domino could not have been Mr. Dennis, but it was the loafer who eventually stole the false necklace.
"If you bear all this in mind you will realise that there was no time in those ten seconds for Mr. Dennis to have made the substitution before the theft was committed. It stands to reason that he could not have done it afterwards.
"Then, again, many people suspected Miss Knight, the dresser; but this supposition we may easily dismiss. An uneducated, stupid girl, not three and twenty, could not possibly have planned so clever a substitution. An imitation necklace of that particular calibre and made to order would cost far more money than a poor theatrical dresser could ever afford; let alone the
