“Is staying at Cannes. She's very keen to help, and I don't say that she may not be useful, too; but give me the real thing, Watts. Had I been able to get a good woman-detective into the villa in her place, a good many doubts as to the character of Mrs. Erskine's ‘bodyguard’ might be over. However, I couldn't.” Two nights later a loud ringing and banging on the door of the villa disturbed the occupants just after they had separated for the night. It was quite late, for they had all been to a theatre and supper party. A postman stood at the door. Could he see Madame Erskine about a cable which had come, marked “Urgent,” and which he was not sure was meant for her, as beyond the name there was no address. Mrs. Erskine, whose bedroom lights had only been twinkling a short time, put her head over the window-sill and said that she would come down at once. The man was told to enter, and the front door closed. A figure crouching behind some bushes sprang lightly erect, waited a moment or two, listening intently at a shuttered window—the window into the lower hall—then, lifting a ladder lying buried in the earth, stood it deftly against Mrs. Erskine's window ledge, and was up with the swiftness of a cat. He took off his rubber shoes and left them on the sill. Then he swung himself into the room and looked at the safe. The door stood wide open, the key was in it. In a second the black figure slipped to the bedroom door. Mrs. Erskine had left it locked. He strode back to the safe, took out its key and weighed it carefully, though swiftly, on a little balance. Followed several quick measurements taken with a sort of dialled spanner, after which four impressions had to be made in boxes containing the special Foch compound. Balance, spanner, and boxes were returned to a little black bag the man wore strapped to his waist. This done with the utmost but unflurried haste, the key was replaced in the safe, and the figure vanished the way it had come. The ladder was laid on the grass for a moment, till the ground under the window had been smoothed with a rake-head, also produced from the bag. In another minute ladder and man seemed to melt, rather than to pass, through the gate.