So while she slept I sat motionless and thinking, thinking. Who was she? whence and of what order of beings? What was her language; how and how long did she live. Was she really alive in our sense of the word, that is, human with the exception of her transparency? and was her shape like that of ordinary mortals, or did she end in some monstrosity like a mermaid? Such were the questions agitating me when interruption came with a knock at the door. My captive awoke and instinctively started away, at the same time giving a low, articulate cry; but I held her firmly, and called to Rachel to bring me a certain relic of slavery which had been brought from the South. I had profited by the discovery my prisoner's awakening furnished: the invisible, I argued, could articulate, then why should she not understand and speak the language of the people among whom she was found? Accordingly a few rapid questions were put to her, which were unanswered. Then I bethought me of a proof that at any rate she understood my words. "My dear child, it is mere perverseness in you to refuse an answer. I am sure you understand. You are in my power for good or evil, and if you refuse to speak I must consider you worthy of the following treatment: you shall be made an example to the crowd of the reality of invisible life." Under cruel treatment of this kind, conjecture became certainty; I felt her shudder at the idea, and she laid her hand appealingly on mine. This was all I wanted; speech was now a mere affair of time. Rachel entered with the rusty handcuffs and handed them to me as if she were conscious and acquiescent in what I did. Not a feature moved, only her eyes shone with inner excitement, in a way I had seen before, while I clasped one link about the unseen wrist. "Pardon," I whispered, "I do not know you yet. I cannot trust you."