The guide's face brightens; he has beaten the true state of the case into our stupid heads at last! "That's just what I mean!" he says, with an air of infinite relief. The door opens before we have recovered the shock inflicted on us by this extraordinary discovery. A little, lean, old gentleman, shrouded in a long black dressing-gown, quietly enters the room. The guide steps forward, and respectfully closes the door for him. We are evidently in the presence of The Master of Books! CHAPTER XVIII. THE DARKENED ROOM. THE little gentleman advances to my bedside. His silky white hair flows over his shoulders; he looks at us with faded blue eyes; he bows with a sad and subdued courtesy, and says, in the simplest manner, "I bid you welcome, gentlemen, to my house." We are not content with merely thanking him; we naturally attempt to apologize for our intrusion. Our host defeats the attempt at the outset by making an apology on his own behalf. "I happened to send for my servant a minute since," he proceeds, "and I only then heard that you were here. It is a custom of the house that nobody interrupts me over my books. Be pleased, sir, to accept my excuses," he adds, addressing himself to me, "for not having sooner placed myself and my household at your disposal. You have met, as I am sorry to hear, with an accident. Will you permit me to send for medical help? I ask the question a little abruptly, fearing that time may be of importance, and knowing that our nearest doctor lives at some distance from this house." He speaks with a certain quaintly precise choice of words--more like a man dictating a letter than holding a conversation. The subdued sadness of his manner is reflected in the subdued sadness of his face. He and sorrow have apparently been old acquaintances, and have become used to each other for years past. The shadow of some past grief rests quietly and impenetrably over the whole man; I see it in his faded blue eyes, on his broad forehead, on his delicate lips, on his pale shriveled cheeks. My uneasy sense of committing an intrusion on him steadily increases, in spite of his courteous welcome. I explain to him that I am capable of treating my own case, having been myself in practice as a medical man; and this said, I revert to my interrupted excuses. I assure him that it is only within the last few moments that my traveling companion and I have become aware of the liberty which our guide has taken in introducing us, on his own sole responsibility, to the house. Mr. Dunross looks at me, as if he, like the guide, failed entirely to understand what my scruples and excuses mean. After a while the truth dawns on him. A faint smile flickers over his face; he lays his hand in a gentle, fatherly way on my shoulder.