The more Inspector French pondered over the problems which his discoveries had raised, the more difficult these problems seemed to grow. There was so desperately little to go on. It was a common enough trouble in detective work certainly, but this business was worse than the average. He could not recall a case which offered fewer clues or “leads.”
As he turned over in his mind all that he had learned it seemed to him indeed that there was but one channel to be explored, and that a channel which offered a very poor chance of success—the £20 bank note. If he were unable to trace the £20 bank note, and the odds were enormously against his doing so, he did not see what other line of inquiry he could follow up.
Of course, there was the usual police question: Who was seen in the vicinity of th
