"Judas," he said. "I remember when I was down here that the little scamp had a kind of whistle like that--something like it. Listen!" Conniston whistled also, and Bernard nodded. "That's it," he declared; "the whistle was given twice." "Then the boy was Judas. He used to signal to Victoria in that way when the pair were up to their pranks. Wait!" Conniston opened the door and whistled loudly in the same way. Twice he did this. Shortly after the second time the pattering of steps was heard and Victoria came running up the stairs with a lighted candle in her hand. She looked white and scared. "Did you expect to see Jerry?" asked her master, blandly. The girl stared and turned even whiter than she was. "I thought it was Jerry, sir," she murmured, leaning against the balustrade. "He used to whistle like that when he came home!" "I learned it from Jerry," said Conniston, mendaciously, "and I tried to see if it would bring you. Go downstairs, girl. There's nothing wrong." Victoria stared at Conniston with a suspicious look in her hard eyes, and then with a toss of her head ran down the stairs. Dick returned to the room and shut the door. "What do you think now?" "It was Judas sure enough," said Bernard. "Of course. And the signal was given to someone in the house to intimate that you were outside. Who came out?" "Mrs. Gilroy?" "Ah! Then she must have been waiting for the signal. By the way, you always seemed mixed over Mrs. Gilroy. When we first met you said that she didn't like you. Then you said she was your friend. Now which do you think she is?" "I can hardly say. She always pretended to be my friend. I was never sure of her." "Then you can be sure of her now. She is your bitter enemy." "I am afraid so," sighed Gore, remembering the accusation. "Well," said Dick, resuming his seat, "what next?" "Mrs. Gilroy came out screeching 'Murder!' She dragged me upstairs and into the sitting-room----" "Did you notice if there was a red lamp in the window?" "No. I was too horrified by the sight of my dead grandfather. I loosened the handkerchief round the throat----" "That was a bandana, Sir Simon's own, and was produced at the inquest. What about the one over the mouth?" "The one steeped in chloroform? I don't know. I had it in my hand when Mrs. Gilroy accused me. Then I lost my head. I must have dropped it." Conniston looked disappointed. "That's a pity," said he. "I fancied you might have unconsciously taken it with you. You see, it was a white handkerchief and Sir Simon never used one of that color. If there happened to be a name on the corner----" "It would be that of the assassin. Is that what you mean?" "Yes, that is what I mean. The assassin must have used his own handkerchief." "Why do you think that?"