'That is I — that is I.' "When I was about twenty years old I began to have an almost nightly experience of my body coming out of my body, and going sometimes on long trips. The trips were usually delightful. I have always kept those experiences mostly to myself I won't go into details here, though I can do so if you ask it. "My trips continued for many years, and I could, and did, make myself float in the air at will. The floating was exactly as you have pictured it. I would always begin lying horizontally over my body, float outwards, then assume an upright position.... The experiences became more rare, and now I very seldom have one. I have not yet read your book, not even the Preface, it was the amazement — the actual shock — of seeing those marvellously accurate illustrations which prompted this letter." Here is an account of a single flight illustrating the effect of an emotional reaction on the Double, of which all pertinacious projectors are conscious. It is recorded in Life and Action, and is told by Captain Sumner E. W. Kittelle. "In April, 1913," he writes, "I was for about a month Captain of the gunboat Marietta, and was lying alongside the dock in Brooklyn, N.Y. My wife remained at the house in the Naval Yard at Boston. One night I returned to the ship, from the city, at about eleven o'clock, went to the cabin, and in due time retired to my stateroom and went to sleep in my bunk. "During sleep I was conscious that I left my physical body, and travelled with seeming great speed over, but some distance above, the ground to Boston, where I sought my own room and took my accustomed place in bed. "Here after a while I was conscious that my wife had placed her hand upon my shoulder, and I made a strong effort