"What time was it when he supposes himself to have seen me?"

"Somewhere about two o'clock."

Miss Arnott reflected.

"To the best of my knowledge and belief I was in bed at two o'clock, and never stirred from it till Evans called me to get into my bath. If, as you suggest, I was out in the woods in my nightdress--delightful notion!--surely I should have brought back with me some traces of my excursion. I believe it rained last night."

"It did; Briggs says it was raining at the time he saw you."

"Then that settles the question; he didn't see me. Was I barefooted?"

"He couldn't see."

"The presumption is that, if I choose to wander about in such an airy costume as a nightgown, it is hardly likely that I should think it necessary to go through the form of putting on either shoes or stockings. Anyhow, I should have been soaked to the skin. When I woke up this morning my nightgown would have shown traces at least of the soaking it had undergone. But not a bit of it; it was as clean as a new pin. Ask Evans! My feet were stainless. My bedroom slippers--the only footwear within reach, were unsoiled. No; I fancy, Mrs Forrester, that those friends of yours have ardent imaginations, and that even the respectable Briggs is not always to be trusted."

"Then you authorise me to contradict the story in toto?

"Yes, Mrs Forrester; I give you the fullest authority to inform anyone and everyone that I never, in the whole course of my life, went out for a stroll in my nightgown, either asleep or waking. Thank you very much indeed for giving me the opportunity of furnishing you with the necessary power."