CHAPTER XXIII CLUES AT THE TOWERMichael gazed in fascinated horror at the tragic spectacle. Then reverently he covered the box with a cloth and walked out into the paved courtyard. “You know him?” asked Staines. Michael nodded. “Yes, it is Lawley Foss, lately scenario editor of the Knebworth Picture Corporation. He was seen alive last night at eleven o’clock. I myself heard, if I did not see him, somewhere about that time. He was visiting Griff Towers, Sir Gregory Penne’s place in Sussex. Was there the usual note?” he asked. “There was a note, but it was quite unusual.” He showed the typewritten slip: it was in the station inspector’s office. One characteristic line, with its ill-aligned letters. “This is the head of a traitor.” That and no more. “I’ve had the Dorking police on the