“Very good, sir. Do you know if the notes were together: if they seemed to have come in from the same party?”
“Willis asked that. They were not near each other in the pile. Of course, the argument is not conclusive, but the suggestion is that they came in separately.”
“If that is so it looks as if Roper was changing them systematically.”
“Possibly. In that case we may expect more notes to come in. That’ll do, French. Go and see Willis and start right in.”
Inspector Willis was seated at the desk in his room, apparently trying to reduce to some sort of order the chaotic heap of papers which covered it.
“Hullo, French! Come in and take a pew,” he greeted his visitor. “I don’t know any one I’d be better pleased to see. If you hadn’t turned up within another ten minutes I was going out abo
