“I think you are right, doctor,” I replied, “and if it is so, her amazing fortitude is all the more admirable.”

“Admirable?” he echoed. “As I said before, she has the courage of ten men.”

A formal dinner was out of the question, of course; indeed, no one attempted to dress. Val Beverley excused herself, saying that she would dine in Madame’s room, and Harley, Wessex, and I, partook of wine and sandwiches in the library.

Inspector Aylesbury arrived about eight o’clock in a mood of repressed irritation. Pedro showed him in to where the three of us were seated, and:

“Good evening, gentlemen,” said he, “here I am, as arranged, but as I am up to my eyes in work on the case, I will ask you, Mr. Harley, to carry out this experiment of yours as quickly as possible.”

“No time shall be lost,” replied my friend, quietly. “May I request you to accompany Detective-Inspector Wessex and Mr. Knox to the Guest House by the high road? Do not needlessly alarm Mrs. Camber. Indeed, I think you might confine your attention to Mrs. Powis. Merely request permission to walk down the garden to the hut, and be good enough to wait there until I join you, which will be in a few minutes after your arrival.”

Inspector Aylesbury uttered an inarticulate, grunting sound, but I, who knew Harley so well, could see that he felt himself to be upon the eve of a signal triumph. What he proposed to do, I had no idea, save that it was designed to clear Colin Camber. I prayed that it might also clear his pathetic girl-wife; and in a sort of gloomy silence I set out with Wessex and Aylesbury, down the drive, past the lodge, which seemed to be deserted to-night, and along the tree-lined high road, cool and sweet in the dusk of evening.

Aylesbury was very morose, and Wessex, who had lighted his pipe, did not seem to be in a talkative mood either. He had the utmost faith in Paul Harley, but it was evident enough that he was oppressed by the weight of evidence against Camber. I divined the fact that he was turning over in his mind the idea of the frame-up, and endeavouring to re-adjust the established facts in accordance with this new point of view.

We were admitted to the Guest House by Mrs. Powis, a cheery old soul; one of those born optimists whose special task in life seems to be that of a friend in need.

As she opened the door, she smiled, shook her head, and raised her finger to her lips.