"You see," I explained, "if he were a ghost, this would be of importance, for everybody knows that ghosts are restricted to certain limits; and after all, dusk though it was, it was rather curious that I had not noticed the pocket-book, which seemed a pretty big one, as he waved it in his hand." "I can't say that what you tell of him sounds at all ghost-like," said Isabel. "He was too prosaic surely! However, what we have to do is to find if the door was a material reality or not." "If it isn't," I said emphatically, "I shall be certain he was not a real person. And if so, there must be some legend about this path which we must set to work to disinter." My heart beat rather faster than usual as we approached the place in the wall whence the unknown man seemed to come out, and for a few minutes our search was unsuccessful. No door was to be seen. The growth of ivy was very thick just there. I stood back a little at last, and surveyed the wall from a short distance, and at one spot it seemed to me that there was a slight break in the line. I kept my eye as closely as possible fixed on this spot while I approached it, and pushed gently against the ivy with my hand. Yes, I had not been mistaken; but I got a start as I suddenly felt what seemed a bit of the wall itself yielding to my touch. I started back with a little exclamation which brought Isabel to my side. [Illustration: "'What is it?' she exclaimed."] "What is it?" she exclaimed. "Have you found it?" "I have found something," I said, and on examining more closely, it proved to be the suspected door, overgrown with ivy indeed, practically indistinguishable from the outside, but in good order nevertheless, moving on its hinges smoothly and noiselessly. It opened inwards of course, and, strange to say, it was open, as has been shown. "I wonder if he forgot to lock it," I said, "or if it is always left unfastened." I pushed it farther ajar as I spoke, Isabel pressing forward eagerly. "Now," I said triumphantly, "we shall get a peep inside the enchanted ground. This _is_ a `find' of mine. Confess, Zella, that I have done more in a few days towards unearthing the mystery than you in twice as many years." But Isabel looked too frightened to take the matter lightly. "Don't speak so loud, Regina," she said in a half whisper; "some one may be near us, inside." She was quite pale with excitement, yet, timid though she was, her curiosity, as well as mine, was thoroughly awakened. "We may as well glance in," she went on, "if we are very, very careful. Just give a look round, Regina," and she drew back to allow me to do so. I obeyed her cautiously. All seemed safe; there was no one in view or within hearing. "It is all right," I said, withdrawing my head; "we may go in a few steps, I am sure, without danger." "Well, first draw-to the door a little," said Isabel sensibly, "for fear of any passer-by noticing that it is open."