Morice declares[148] explicitly (what in any case no one in a sane state of mind would have doubted) that Rimbaud wished to make one of those silly jokes which imbeciles and idiots are in the habit of perpetrating. Some of his comrades, however, took the sonnet in grim earnest, and deduced from it a theory of art. In his Traité du Verbe René Ghil specifies the colour-value, not only of individual vowels, but of musical instruments. ‘Harps establish their supremacy by being white. And violins are blue, often softened by a shimmer of light, to subdue paroxysms.’ (It is to be hoped the reader will duly appraise these combinations of words.) ‘In the exuberance of ovations, brass instruments are red, flutes yellow, allowing the childlike to proclaim itself astonished at the luminance of the lips. And the organ, synthesis of all simple instruments, bewails deafness of earth and the flesh all in black. …’ Another Symbolist, who has many admirers, M. Francis Poictevin, teaches us, in Derniers Songes, to know the feelings corresponding to colours. ‘Blue goes—without more of passion—from love to death; or, more accurately, it is a lost extreme. From turquoise blue to indigo, one goes from the most shame-faced influences to final ravages.’
Wiseacres were, of course, at once to the fore, and set up a quasi-scientific theory of ‘colour-hearing.’ Sounds are said to awaken sensations of colour in many persons. According to some, this was a gift of specially finely organized nervous natures; according to others, it was due to an accidental abnormal connection between the optic and acoustic brain-centres by means of nerve filaments. This anatomical explanation is entirely arbitrary, and has not been substantiated by any facts. But ‘colour-hearing’ itself is by no means confirmed. The most complete book hitherto published on this subject, the author of which is the French oculist, Suarez de Mendoza,[149] collects all the available observations on this alleged phenomenon, and deduces from them the following definition: ‘It is the faculty of associating tones and colours, by which every objective acoustic perception of sufficient intensity, nay, even the memory-image of such a perception, arouses in certain persons a luminous or non-luminous image, which is always the same for the same letters, the same tone of voice or instrument, and the same intensity or pitch of tone.’ Suarez well hits the truth when he says, ‘Colour-hearing’ (he calls it pseudo-photesthésie) ‘is often a consequence of an association of ideas established in youth … and often of a special action of the brain, the particular nature of which is unknown to us, and may have a certain similarity to sense-illusion and hallucination.’ For my part, I have no doubt that colour-hearing is always the consequence of association of ideas, the origins of which must remain obscure, because the combination of certain presentations of colour with certain sensations of sound may possibly depend upon the very evanescent perceptions of early childhood, which were not powerful enough to arouse the attention, and have therefore remained undiscerned in consciousness. That it is a question of purely individual associations brought about by the accident of associated ideas, and not of organic co-ordinations depending upon definite abnormal nervous connections, is made very probable by the fact that every colour-hearer ascribes a different colour to the same vowel or instrument. We have seen that to Ghil the flute is yellow, to L. Hoffmann (whom Goethe cites in his Farbenlehre) this instrument is scarlet. Rimbaud calls the letter ’a’ black. Persons whom Suarez mentions heard this vowel as blue, and so on.
The relation between the external world and the organism is originally very simple. Movements are continually occurring in nature, and the protoplasm of living cells perceives these movements. Unity of effect corresponds to unity of cause. The lowest animals perceive of the outer world only this, that something in it changes, and possibly, also, whether this change is marked or slight, sudden or slow. They receive sensations differing quantitatively, but not qualitatively. We know, for example, that the proboscis, or syphon, of the Pholas dactylus, which contracts more or less vigorously and quickly at every excitation, is sensitive to all external impressions—light, noise, touch, smell, etc. This mollusc sees, hears, feels and smells, therefore, with this simple organ; his proboscis is to him at once eye, ear, nose, finger, etc. In the higher animals the protoplasm is differentiated. Nerves, ganglia, brain and sense-apparatus are formed. The movements of nature are now perceived in a variety of ways. The differentiated senses transform the unity of the phenomenon into the diversity of the percept. But even in the highest and most differentiated brain there still remains something like a very distant and very dim remembrance that the cause which excites the different senses is one and the same movement, and there are formed presentations and conceptions which would be unintelligible if we could not concede this vague intuition of the fundamental unity of essence in all perceptions. We speak of ‘high’ and ‘deep’ tones, and thus give to sound-waves a relationship in space which they cannot have. In the same way we speak of tone-colour, and, conversely, of colour-tones, and thus confound the acoustic and optic properties of the phenomena. ‘Hard’ and ‘soft’ lines or tones, ‘sweet’ voices, are frequent modes of expression, which depend on a transference of the perception of one sense to the impressions of another. In many cases this method of speech may no doubt be traced to mental inertia. It is more convenient to designate a sense-perception by a word which is familiar, though borrowed from the province of another sense, than to create a special word for the particular percept. But even this loan for convenience’ sake is possible and intelligible only if we admit that the mind perceives certain resemblances between the impressions of the different senses—resemblances which, although they are often to be explained by conscious or unconscious association of ideas, are oftener quite inexplicable objectively. It only remains for us to assume that consciousness, in its deepest substrata, neglects the differentiation of phenomena by the various senses, passes over this perfection attained very late in organic evolution, and treats impressions only as undifferentiated material for the acquirement of knowledge of the external world without reference to their origin by way of this or that sense. It thus becomes intelligible that the mind mingles the perceptions attained through the different senses, and transforms them one into another. Binet[150] has established, in his excellent essays, this transposition of the senses in hysterical persons. A female patient, whose skin was perfectly insensible on one half of her body, took no notice when, unseen by herself, she was pricked with a needle. But at the moment of puncture there arose in her consciousness the image of a black (in the case of another invalid, of a bright) point. Consciousness thus transposed an impression of the nerves of the skin, which, as such, was not perceived, into an impression of the retina, of the optic nerve.
In any case, it is an evidence of diseased and debilitated brain-activity, if consciousness relinquishes the advantages of the differentiated perceptions of phenomena, and carelessly confounds the reports conveyed by the particular senses. It is a retrogression to the very beginning of organic development. It is a descent from the height of human perfection to the low level of the mollusc. To raise the combination, transposition and confusion of the perceptions of sound and sight to the rank of a principle of art, to see futurity in this principle, is to designate as progress the return from the consciousness of man to that of the oyster.
Moreover, it is an old clinical observation that mental decay is accompanied by colour mysticism. One of Legrain’s[151] mental invalids ‘endeavoured to recognise good and evil by the difference of colour, ascending from white to black; when he was reading, words had (according to their colour) a hidden meaning, which he understood.’ Lombroso[152] cites ‘eccentric persons’ who, ‘like Wigman, had the paper for their books specially manufactured with several colours on each page. … Filon painted each page of the books he wrote in a different colour.’ Barbey d’Aurevilly, whom the Symbolists venerate as a pioneer, used to write epistles in which each letter of a word was coloured with a different tint. Most alienists know similar cases in their experience.
The more reliable Symbolists proclaim their movement as ‘a reaction against naturalism.’ Such a reaction was certainly justified and necessary; for naturalism in its beginnings, as long as it was embodied in De Goncourt and Zola, was morbid, and, in its later development in the hands of their imitators, vulgar and even criminal, as will be proved further on. Nevertheless Symbolism is not in the smallest degree qualified to conquer naturalism, because it is still more morbid than the latter, and, in art, the devil cannot be driven out by Beelzebub.
Finally, it is affirmed that Symbolism connotes ‘the inscribing of a