"Oh, you've come at last!" she rasped, in a harsh, throaty voice roughened by drink. "I know you. I——"

"And I know you!" I cut her short, to show that I was not cowed.

Sitting up in bed, hugging her knees, she started at my words so that the springs shook. Whatever it was she had meant to say, she forgot it for the moment, and challenged me: "That's a lie!" she snapped. "You don't know me yet—but you soon will."

"I've known you since you came into my room at Courtenaye Abbey the night you tried to burn down the house," I said. "You were spying for the Germans in the war. Heaven knows all the harm you may have done. I can't imagine for whom you're spying now. Anyhow, you can't frighten me again. The war's over, but I'll have you arrested for what you did when it was on."

The woman scowled and laughed, more Medusa-like than ever. I really felt as if she might turn me to stone. But she shouldn't guess her power.

"Pooh!" she said, showing tobacco-stained teeth. "You won't want to arrest me when you hear who I am, Lady Shelagh Leigh!"

"Lady Shelagh Leigh!" It was on my lips to cry, "I'm not Shelagh Leigh!" But I stopped in time. The less I let her find out about me, and the more I could find out about her before rousing the yacht, the better. I spoke not a word, but waited for her to go on—which she did in a few seconds.

"That makes you sit up, doesn't it?" she sneered. "That hits you where you live! Why did you think I chose your cabin? I didn't select it by chance. I confess I was taken back at your remembering. I thought I hadn't given you time for much study of my features that other night. But it doesn't matter. You can't do anything to me. I'll soon prove that! But I had a good look at you, there in your friend's old Devonshire rat-trap. I knew who you both were. It was easy to find out! And the other day, when I heard that Lady Shelagh Leigh was likely to marry Roger Fane, I said to myself, 'Gosh! One of the girls I saw at the darned old Abbey!'"

"Oh, you said that to yourself!" I echoed. And, though my knees failed, I kept to my feet. To stand towering above the squatting figure on the bed seemed to give me moral as well as physical advantage. "How did you know, pray, which girl I was?"

"I knew, 'pray,'" she mocked, "because you've got the best room on this yacht. Roger'd be sure to give that to his best girl. Which is how I'm sure you're not Elizabeth Courtenaye."