And at this point he was visited by a thought even more unpleasant. If, after all, it had not been Denver whom Mrs. Marchbanks had heard in the library, but someone else--someone who had likewise an appointment with the blackmailer--someone who was on his side as against Cathcart--who knew that there might be danger in the interview. Had he himself paid proper attention to the grass lawn between the house and the thicket? Might Thursday morning perhaps have revealed here and there a trodden blade that rain and sap had since restored to uprightness? Had Peter and he found all the footsteps in the wood? Had some more trusted hand fired that shot at close quarters? Once again--whose was the green-eyed cat?
Surmises and surmises, each uglier than the last, thronged into Parker's mind. He took
