So this was the explanation of the unlocked door and of the nocturnal vigil of Milverton. There was the gentle rustle of a woman's dress. I had closed the slit between the curtains as Milverton's face had turned in our direction, but now I ventured very carefully to open it once more. He had resumed his seat, the cigar still projecting at an insolent angle from the corner of his mouth. In front of him, in the full glare of the electric light, there stood a tall, slim, dark woman, a veil over her face, a mantle drawn round her chin. Her breath came quick and fast, and every inch of the lithe figure was quivering with strong emotion.
"Well," said Milverton, "you made me lose a good night's rest, my dear. I hope you'll prove worth it. You couldn't come any other time -- eh?"