In our sleep, when we are revolving the day's problems and searching for solutions, many other facts, stored up in our nervous systems, rise to consciousness and are used in solving the problem.
In the personal case I cited, my unconscious applied its searchlight to recent events; in other cases reported in the literature of the subject the unconscious is shown bringing back events which seemed to have been entirely forgotten.
Forgotten incidents which suddenly rise to consciousness in dreams are sometimes responsible for visions which on superficial observation appear truly prophetic. Maury cites the following in his book on "Sleep and Dreams":
"Mr. F. decided once to visit the house where he had been brought up in Montbrison and which he had not seen in twenty-five years. The night before he started on his trip, he dreamt that he was in Montbrison and that he met a man who told him he was a friend of his father. Several days later, while in Montbrison he actually met the man he had seen in his dream and who turned out to be some one he really knew in his childhood, but had forgotten in the intervening years. The real person was much older than the one in the dream, which is quite natural."
One finds in the Proceedings of the Society for Psychical Research many remarkable examples of dreams which, to the uninitiated, appear truly miraculous. Remembering, however, the wonders accomplished by Lucie under the influence of a hypnotic command, we may realize that the book-keepers who suddenly find in a dream the mistakes which have prevented them from balancing their books, or the various people who locate missing objects, are simply continuing in their sleep the day's work, drawing no longer upon their limited store of conscious memories and impressions, but upon all the wealth of information which is contained in their unconscious.
Even the famous dream of Professor Hilprecht loses much of its glamour when viewed from this angle. Hilprecht had spent quite some time trying to decipher two small fragments of agate which were supposed to belong to the finger rings of some Babylonian god. He had given up the task and classified the fragments as undecipherable in a book on the subject. One night he had put his "o. k." on the final proofs of that book, feeling, however, rather dissatisfied at his inability to account for the inscriptions found on those ancient stones. He went to bed, weary and exhausted and had a remarkable dream: A tall, thin priest of Nippur appeared to him, led him to the treasure chamber of the temple of Bel and told him that the two fragments in question should be put together, as they were, not finger rings, but earrings made for a god by cutting a votive cylinder into three parts. The next morning he did as the dream priest had told him to do, and was able to read the inscription without any difficulty.