I now set to work to make a thorough examination of his belongings, musing that perhaps the best way to get to the bottom of his strange trouble would be to provide him with some of the ordinary amenities of life. I found that the tools were not too rusty to be of service, and being a person with talent for doing things, I was soon interested in planning how I could make a habitable place out of the cave. In the latitude I knew that a door and a fireplace would never be an absolute necessity; but I pleased myself thinking that they might not be useless when the storms blew in. Also, being blessed with much knowledge of the natural world, I flattered myself that before many days would have passed I should have added considerably to the comforts of the house. I gave the balance of the day to a preliminary ransacking of the island. A scientist has an inexhaustible mine of interest in such an environment, and in the plans which I formed for work I forgot everything else for the time. And so towards sundown I returned to the cabin. My brother was still pacing to and fro, exactly as I had left him. Taught by previous experience, I entered the cabin without addressing him, and set about preparing a meal. I had not gone very far before I heard his step behind me. “Edward,” he said. “What is it?” I asked, turning. “I wished merely to tell you—that you will not see me for a day or two. I wish you not to worry about me.” I gazed at him in perplexity that was too great to permit of my framing a question. His haggard glance met mine again, and again he put his hand upon my shoulder with a gesture of affection; then he turned and went slowly away. The incident diminished my appetite, for I had expected to interest him in my banquet. I sat for hours afterwards, gazing out of the cavern entrance at the moonlighted grove, silent and desolate beyond any telling. I think I never felt more alone than just then. The problem was my only company; I had no idea where Daniel had gone; but after a feverish sleep I was up again at dawn, my mind fully made up for a search. I fear I drag out my story—it was nearly sundown when at last my efforts were rewarded. I was returning home in despair and misery, when, suddenly, in the back of the same cliffs in which was our home, I saw another opening, and with a gleam of hope I hurried towards it and peered in. It was too dark to see, but I entered and stepped to one side in the darkness; and then, as my eyes adjusted themselves to the gloom, I saw my brother.