Sometimes these mental images are as vivid as the actual images, or even more vivid. Everybody has heard the story of Blake, who, when he was painting a portrait, only required one sitting, because subsequently he could see the model as distinctly as if he were actually sitting in the chair. Mrs. Haweis wrote to Mr. Galton that all her life she has had at times a waking vision of "a flight of pink roses floating in a mass from right to left," and that before her ninth year they were so large and brilliant that she often tried to touch them; and their scent, she adds, was overpowering.

Much has been written regarding the remarkable feats of Zuckertort and Blackburn who can play as many as sixteen to twenty games of chess at once, and blindfolded. Of course the only way they can do this is by having in the mind a clear picture of each chess-board, with all the figures arranged in proper order.

Mr. Galton says he has among his notes "many cases of persons mentally reading off scores when playing the pianoforte, or manuscripts when they are making speeches;" and he knows a lady, the daughter of an eminent musician, who often imagines she hears her father's playing. "The day she told me of it," he says, "the incident had again occurred. She was sitting in her room with her maid, and she asked the maid to open the door that she might hear the music better. The moment the maid got up the music disappeared."

It is obvious that this case, like that of the eminent painter just referred to, borders closely on the hallucinations of the insane, and Blake did become insane subsequently. But usually there is nothing abnormal or pathologic in the power of mentally recalling sights or sounds, and it would be well if everybody cultivated this power. Mr. Galton mentions an electrical engineer who was able to recall forms with great precision, but not color. But after some exercise of his color memory he became quite an adept in that, too, and declared that the newly-acquired power was a source of much pleasure to him.

In music most of us have the power of recalling a simple melody; and who has not been tormented at times by an unbidden melody persistently haunting his ears until he was almost ready to commit suicide? But to recall a melody at will with any particular tone-color, i.e., to imagine it as being played by a flute, or a violin, or a horn, is much less easy; and still more difficult is it to hear two or more notes at once in the mind, that is to recall harmonies. It is for this reason that people of primitive musical taste care only for operas which are full of "tunes." These they can whistle in the street and be happy, while the harmonies and orchestral colors elude their comprehension and memory. Consequently they call these works "heavy," "scientific," or "intellectual;" whereas if they took pains to educate their musical imaginations, they would soon revel in the magic harmonies of modern operas, with their infinite variety of gorgeous orchestral colors.

Every student of music should carefully heed Schumann's advice. "Exercise your imagination," he says, "so that you may acquire the power of remembering not only the melody of a composition, but also the harmonies which accompany it." And again he says, "You must not rest until you are able to understand music on paper." I remember that, as a small boy, I used to wonder at my father, who often sat in a corner all the evening looking over the score of an opera or symphony. And I was very much surprised at the time when he informed me that this simple reading of the score gave him almost as vivid a pleasure as if he heard it with full orchestra. This power of hearing music with the eyes, as it were, is common to all thorough musicians, and is, of course, most highly developed in the great composers. Schumann even alludes to the opinion, which some one had expressed, that a thorough musician ought to be able, on listening for the first time to a complicated orchestral piece, to see it bodily as a score before his eyes. He adds, however, that this is the greatest feat that could be imagined; and I, for my part, doubt whether even the marvellously comprehensive mind of a musical genius would be able to accomplish it.

These facts illustrate the manner in which composers, being virtuosi of the musical imagination, are able to elaborate mentally, and keep in the memory, a complete operatic or symphonic score, just as, for example, Alexander Dumas, when he wished to write a new novel, used to hire a yacht and sail on Southern waters for several days, lying on his back—which, by the way, is an excellent method of starting a train of thought—and thus arranging all the details of the plot in his mind.

The exact way in which original ideas come into the mind is, of course, a mystery in music as in literature. Every genius passes through a period of apprenticeship, in which he assimilates the discoveries of his predecessors, reminiscences of which make up the bulk of his early works. Everybody knows how Mozartish, e.g., Beethoven's first symphony is, and how much in turn Mozart's early works smack of Haydn. Gradually, as courage comes with years, the gifted composer sets out for unexplored forests and mountain ranges, attempting to scale summits which none of his predecessors had trod. I say, as courage comes, for in music, strange to say, it requires much courage to give the world an entirely new thought. An original composer needs not only the courage that is common to all explorers, but he must invariably come back prepared to face the accusation that his new territory is nothing but a howling wilderness of discords. This has been the case quite recently with Wagner, as it was formerly with Schumann, Beethoven, Mozart, the early Italian composers, and many others, including even Rossini, who certainly did not deviate very far from the beaten paths. Seyfried relates that when Beethoven came across articles in which he was criticised for violating established rules of composition, he used to rub his hands gleefully and burst out laughing. "Yes, yes!" he exclaimed, "that amazes them, and makes them put their heads together, because they have not seen it in any of their text-books."

Fortunately for their own peace of mind, the majority of the minor composers never get beyond a mere rearrangement of remembered melodies and modulations. Their minds are mere galleries of echoes. They write for money or temporary notoriety, and not because their brains teem with ideas that clamor for utterance. The pianist Hummel was one of this class of composers. But whatever his short-comings, he had at least, as Wagner admits, the virtue of frankness. For when he was asked one day what thoughts or images he had in his mind when he composed a certain concerto, he replied that he had been thinking of the eighty ducats which his publisher had promised him!

Yet even the greatest composers cannot always command new thoughts at will, and it is therefore of interest to note what devices some of them resorted to rouse their dormant faculties. Weber's only pupil, Sir Julius Benedict, relates that Weber spent many mornings in "learning by heart the words of 'Euryanthe,' which he studied until he made them a portion of himself, his own creation, as it were. His genius would sometimes lie dormant during his frequent repetitions of the words, and then the idea of a whole musical piece would flash upon his mind, like the bursting of light into darkness."