It had long been my belief that human thought consists basically of atomic or molecular motion, convertible into ether waves of radiant energy like heat, light, and electricity. This belief had early led me to contemplate the possibility of telepathy or mental communication by means of suitable apparatus, and I had in my college days prepared a set of transmitting and receiving instruments somewhat similar to the cumbrous devices employed in wireless telegraphy at that crude, pre-radio period. These I had tested with a fellow-student; but achieving no result, had soon packed them away with other scientific odds and ends for possible future use. Now, in my intense desire to probe into the dream life of Joe Slater, I sought these instruments again; and spent several days in repairing them for action. When they were complete once more I missed no opportunity for their trial. At each outburst of Slater's violence, I would fit the transmitter to his forehead and the receiver to my own; constantly making delicate adjustments for various hypothetical wave-lengths of intellectual energy. I had but little notion of how the thought-impressions would, if successfully conveyed, arouse an intelligent response in my brain; but I felt certain that I could detect and interpret them. Accordingly I continued my experiments, though informing no one of their nature. * * * * * It was on the twenty-first of February, 1901, that the thing occurred. As I look back across the years I realise how unreal it seems; and sometimes half-wonder if old Dr. Fenton was not right when he charged it all to my excited imagination. I recall that he listened with great kindness and patience when I told him, but afterward gave me a nerve-powder and arranged for the half-year's vacation on which I departed the next week. That fateful night I was wildly agitated and perturbed, for despite the excellent care he had received, Joe Slater was unmistakably dying. Perhaps it was his mountain freedom that he missed, or perhaps the turmoil in his brain had grown too acute for his rather sluggish physique; but at all events the flame of vitality flickered low in the decadent body. He was drowsy near the end, and as darkness fell he dropped off into a troubled sleep. I did not strap on the strait-jacket as was customary when he slept, since I saw that he was too feeble to be dangerous, even if he woke in mental disorder once more before passing away. But I did place upon his head and mine the two ends of my cosmic "radio" hoping against hope for a first and last message from the dream world in the brief time remaining. In the cell with us was one nurse, a mediocre fellow who did not understand the purpose of the apparatus, or think to inquire into my course. As the hours wore on I saw his head droop awkwardly in sleep, but I did not disturb him. I myself, lulled by the rhythmical breathing of the healthy and the dying man, must have nodded a little later.