“Very,” I agreed with a sickly feeling. “What do the police think?” “Redway means to take a plaster cast of it—says it’s an important clue. Got a cigarette?” I pushed the box before him, with sinking heart, and at the same time invited him to the table to have breakfast, for I had not yet finished. “Breakfast!” he cried. “Why, I had mine at six, and am almost ready for lunch. I’m an early bird, you know.” It was true. He had cultivated the habit of early rising by going cub-hunting with the Stanchester hounds, and it was his boast that he never breakfasted later than six either summer or winter. “Did they find anything else?” I inquired, fearing at the same time to betray any undue curiosity. “Found a lot of marks of men’s boots, but they might have been ours,” he answered in his bluff way as he lit his cigarette. “My theory is that the mark of the woman’s shoe is a very strong clue. Some woman knows all about it—that’s very certain, and she’s a person who wears thin French shoes, size three.” “Does Redway say that?” “No, I say it. Redway’s a fool, you know. Look how he blundered in that robbery in Northampton a year ago. I only wish we could get a man from Scotland Yard. He’d nab the murderer before the day is out.” At heart I did not endorse this wish. On the contrary the discovery of this footmark that had escaped me was certainly a very serious contretemps. My endeavours must, I saw, now all be directed towards arranging matters so that, if necessary, Lolita could prove a complete alibi. “Do you know,” went on the doctor, “there’s one feature in the affair that’s strangest of all, and that is that there seems to have been an attempt to efface certain marks, as though the assassin boldly returned to the spot after the removal of the body and scraped the ground in order to wipe out his footprints. Redway won’t admit that, but I’m certain of it—absolutely certain. I suppose the ass won’t accept the theory because it isn’t his own.” I tried to speak, but what could I say? The words I uttered resolved themselves into a mere expression of blank surprise, and perhaps it was as well, for the man before me was as keen and shrewd as any member of the Criminal Investigation Department. He was essentially a man of action, who whether busy or idle could not