The last day of my holiday came. I bade a long and sad farewell to lake and mountain, and, accompanied by Carriston, started for home. I did not see the parting proper between the young people--that was far too sacred a thing to be intruded upon--but even when that protracted affair was over, I waited many, many minutes whilst Carriston stood hand-in-hand with Madeline, comforting himself and her by reiterating "Only six weeks--six short weeks! And then--and then!" It was the girl who at last tore herself away, and then Carriston mounted reluctantly by my side on the rough vehicle. From Edinburgh we travelled by the night train. The greater part of the way we had the compartment to ourselves. Carriston, as a lover will, talked of nothing but coming bliss and his plans for the future. After a while I grew quite weary of the monotony of the subject, and at last dozed off, and for some little time slept. The shrill whistle which told us a tunnel was at hand aroused me. My companion was sitting opposite to me, and as I glanced across at him my attention was arrested by the same strange intense look which I had on a previous occasion at Bettws-y-Coed noticed in his eyes--the same fixed stare--the same obliviousness to all that was passing. Remembering his request, I shook him, somewhat roughly, back to his senses. He regarded me for a moment vacantly, then said: "Now I have found out what was wanting to make the power I told you of complete. I could see her if I wished." "Of course you can see her--in your mind's eye. All lovers can do that." "If I tried I could see her bodily--know exactly what she is doing." He spoke with an air of complete conviction. "Then I hope, for the sake of modesty, you won't try. It is now nearly three o'clock. She ought to be in bed and asleep." I spoke lightly, thinking it better to try and laugh him out of his folly. He took no notice of my sorry joke. "No," he said, quietly, "I am not going to try. But I know now what was wanting. Love--such love as mine--such love as hers--makes the connecting link, and enables sight or some other sense to cross over space, and pass through every material obstacle." "Look here, Carriston," I said seriously, "you are talking as a madman talks. I don't want to frighten you, but I am bound both as a doctor and your sincere friend to tell you that unless you cure yourself of these absurd delusions they will grow upon you, develop fresh forms, and you will probably end your days under restraint. Ask any doctor, he will tell you the same." "Doctors are a clever race," answered my strange young friend, "but they don't know everything." So saying he closed his eyes and appeared to sleep.