The student will find that nearly all the "systems" or "secret methods" that are being offered for sale in "courses," often at a very high price, are merely variations, improvements upon, or combinations of the three forms of artificial methods named above. New changes are constantly being worked on these old plans; new tunes played on the same old instruments; new chimes sounded from the same old bells. And the result is ever the same, in these cases—disappointment and disgust. There are a few natural systems on the market, nearly all of which contain information and instruction that makes them worth the price at which they are sold. As for the others—well, judge for yourself after purchasing them, if you so desire.

Regarding these artificial and fanciful systems, Kay says: "All such systems for the improvement of the memory belong to what we have considered the first or lowest form of it. They are for the most part based on light or foolish associations which have little foundation in nature, and are hence of little practical utility; and they do not tend to improve or strengthen the memory as a whole." Bacon says that these systems are "barren and useless," adding: "For immediately to repeat a multitude of names or words once repeated before, I esteem no more than rope-dancing, antic postures, and feats of activity; and, indeed, they are nearly the same things, the one being the abuse of the bodily as the other of the mental powers; and though they may cause admiration, they cannot be highly esteemed." And as another authority has said: "The systems of mnemonics as taught, are no better than crutches, useful to those who cannot walk, but impediments and hindrances to those who have the use of their limbs, and who only require to exercise them properly in order to have the full use of them."

In this work, there shall be no attempt to teach any of these "trick systems" that the student may perform for the amusement of his friends. Instead, there is only the desire to aid in developing the power to receive impressions, to register them upon the memory, and readily to reproduce them at will, naturally and easily. The lines of natural mental action will be followed throughout. The idea of this work is not to teach how one may perform "feats" of memory; but, instead, to instruct in the intelligent and practical use of the memory in the affairs of every-day life and work.