Every line ever read in print, every picture and face and house is there.

Many an experiment has shown this to be true; also that by mesmerizing or hypnotizing processes the most hidden images or memories can be awakened.

In fact, the idea has lost much of its wonder since the time of Coleridge, now that every sound can be recorded, laid away and reproduced, and we are touching closely on an age when all that lies _perdu_ in any mind can or will be set forth visibly, and all that a man has ever _seen_ be shown to the world.

For this is no whit more wonderful than that we can convey images or pictures by telegraph, and when I close my eyes and recall or imagine a form it does not seem strange that there might be some process by means of which it might be photographed.
And here we touch upon the Materialization of Thought, which conception loses a part of the absurdity with which Spiritualists and Occultists have invested it, if we regard all nature as one substance.
For, in truth, all that was ever perceived, even to the shadow of a dream by a lunatic, had as real an existence while it lasted as the Pyramids of Egypt, else it could not have been perceived.

Sense cannot, even in dreams, observe what is not for the time an effect on matter.