"Who is that?" I asked sharply, for instinctively I distrusted the man.

"That's Dr. Bauerstein," said John shortly.

"And who is Dr. Bauerstein?"

"He's staying in the village doing a rest cure, after a bad nervous breakdown. He's a London specialist; a very clever man-one of the greatest living experts on poisons, I believe."

"And he's a great friend of Mary's," put in Cynthia, the irrepressible.

John Cavendish frowned and changed the subject.

"Come for a stroll, Hastings. This has been a most rotten business. She always had a rough tongue, but there is no stauncher friend in England than Evelyn Howard."

He took the path through the plantation, and we walked down to the village through the woods which bordered one side of the estate.

As we passed through one of the gates on our way home again, a pretty young woman of gipsy type coming in the opposite direction bowed and smiled.

"That's a pretty girl," I remarked appreciatively.

John's face hardened.

"That is Mrs. Raikes."

"The one that Miss Howard--"

"Exactly," said John, with rather unnecessary abruptness.

I thought of the white-haired old lady in the big house, and that vivid wicked little face that had just smiled into ours, and a vague chill of foreboding crept over me. I brushed it aside.

"Styles is really a glorious old place," I said to John.

He nodded rather gloomily.

"Yes, it's a fine property. It'll be mine some day-should be mine now by rights, if my father had only made a decent will. And then I shouldn't be so damned hard up as I am now."

"Hard up, are you?"

"My dear Hastings, I don't mind telling you that I'm at my wit's end for money."

"Couldn't your brother help you?"

"Lawrence? He's gone through every penny he ever had, publishing rotten verses in fancy bindings. No, we're an impecunious lot. My mother's always been awfully good to us, I must say. That is, up to now. Since her marriage, of course--" he broke off, frowning.

For the first time I felt that, with Evelyn Howard, something indefinable had gone from the atmosphere. Her presence had spelt security. Now that security was removed-and the air seemed rife with suspicion. The sinister face of Dr. Bauerstein recurred to me unpleasantly. A vague suspicion of every one and everything filled my mind. Just for a moment I had a premonition of approaching evil.