I drew my little bed out into the garden and made it ready to receive me. I pressed another button, which would make day slowly become night. I took a final dip and a final walk, then staggered to my bed and lay down in the twilight.

But even yet I must not sleep. Instead, I concentrated my attention on the recurrent rise and fall of my own breathing, and on the nature of time. This process I had to maintain for about thirty hours, without food or sleep or any respite. Toward the end of this period, had you seen me, you would have said that I was at last falling asleep, and finally you would have declared me to be in a very profound slumber. And so in a manner I was, save that a single organ in my brain, usually dormant, was now intensively active, and preparing to take possession of my whole body as soon as my brain should have been refreshed by its deep sleep. After a couple of days of unconsciousness I did indeed wake, but not to the familiar surroundings.

For months, even years or decades, my body might now remain inert upon its bed, save for periodic risings to perform its natural functions of eating, drinking and excretion. Frequently also it would walk for hours at a time in the garden or bathe in the pond. But these activities would be carried out in complete abstraction, and had anyone spoken to me at these times, I should have been unaware. For the higher centres of my brain were wholly possessed by the past. To anyone watching me during these routine activities, I should have appeared as a sleep-walker. At these times, no less than during the long periods of quiescence on my bed, the observer would have seen that my face, and sometimes my whole body, was constantly influenced by emotion and thought. For during the whole trance, of course, my brain would be experiencing sequences of events in the remote past, and my whole body would respond to these experiences with my normal emotional reactions. Thus to the observer I should appear to be asleep and dreaming, save that my expressions would be far more definite and systematic than those of a dreamer.

Here I will mention one point of philosophical interest. The duration of the trance has no relation to the duration of the past events observed. Thus I might lie in my comfortable prison for a year, and in that time I might observe many years of past events, or many thousands of Years, or even the whole span of man's history. The length of the trance depends only on the complexity of the matter observed. I might for instance spend a year in observing an immense number of simultaneous events which took only a few minutes to occur. Or I might cover the whole life of one individual in far more detail than was afforded by his own consciousness of his life story. Or I might sweep through whole epochs, tracing out only some one simple thread of change. In fact the length of the trance depends simply on the brain's capacity to assimilate, not upon the actual duration of the events observed.

When as much material has been gathered as can be conveniently grasped, the explorer gradually withdraws his attention from the past. He then sinks into an undisturbed sleep which may last for several weeks. During this phase his body shows none of that ceaseless emotional expression which is characteristic of the main trance. It lies inert, as though stunned. Finally the explorer's attention begins to concentrate itself again, and to revert once more to his own body and its surroundings. He wakes, and lies for a while passively accepting the new visual impressions. He then lives in his apartments for months or years recording his experiences in rough notes, to be organized at a later date. Sometimes, when this process is finished, he chooses to return at once, without respite, to the past for further data. Sometimes he leaves his room to confer with other workers.