process is aggravated by a purely physical illness, which corresponds to his psychic ailment. Just at that time Verhaeren was attacked by a nervous affection of the stomach, one of those repercussions of the psychic on the physical system in which it is hard to say whether the ailing stomach causes the neurasthenic condition, or the weakness of the nerves the stagnation of the digestive functions. Both ailments are inwardly co-ordinated, both are a rejection of the outer impression, an impotent refusal of the chemical conversion. Just as the stomach feels all food as pain, as a foreign body, so the ear repels every sound as an intrusion, so the eye rejects every impression as pain. This nervous rejection of the outer world was already then, in Verhaeren's life, pathological. The bell on the door had to be removed, because it shocked his nerves; those who lived in the house had to wear felt slippers instead of shoes; the windows were closed to the noise of the street. These years in Verhaeren's life are the lowest depth, the crisis of his vitality. It is in such periods of depression that invalids shut themselves off from the world, from their fellow-men, from the light of day, from the din of existence, from books, from all contact with the outer world, because they instinctively feel that everything can be a renewal of their pain, and nothing an enrichment of their life. They seek to soften the world, to tone its colours down; they bury themselves in the monotony of solitude. This 'soudaine lassitude'[1] then impinges on to the moral nature; the will, losing the sense of life, is paralysed; all standards of value collapse; ideals founder in the most frightful Nihilism. The earth becomes a chaos, the sky an empty space; everything is reduced to nothingness, to an absolute negation. Such crises in the life of a poet are almost always sterile. And it is therefore of incalculable value that here a poet should have observed himself and given us a clear picture of himself in this state, that, without fear of the ugliness, the confusion of his ego, he should have described, in terms of art, the history of a psychic crisis. In Verhaeren's trilogy, _Les Soirs, Les Débâcles, Les Flambeaux Noirs_, we have a document that must be priceless to pathologists as to psychologists. For here a deep-seated will to extract the last consequence from every phase of life has reproduced the stadium of a mental illness right to the verge of madness; here a poet has with the persistence of a physician pursued the symptoms of his suffering through every stage of lacerating pain, and immortalised in poems the process of the inflammation of his nerves.