CHAPTER XV

The Gas Bill "Now, let's hear all about this. How do you know about the letter, anyway?" "I was there when it was found," said Spike. "In fact, they'd have passed it over if I hadn't seen it." "They would, would they?" said the old man grimly. "I saw it and made a copy before the inspector realised it was anything important." He took out a pocket-book and extracted a sheet of paper, which he opened and laid on the table. "I'll read it to you," he said. "There's no date, a fact that has rattled the police. "'Mr. …