At the same time, he realized that there were natural reasons why his operas were not understood. They were written in such a novel style, both vocal and instrumental, that the singers, players, and conductors found it difficult to perform them correctly, the consequence being that they did not specially impress the audiences, which, moreover, were bewildered by finding themselves listening to works so radically different from what they had been accustomed to in the opera-houses. In the hope of remedying this state of affairs Wagner devoted several years to writing essays, in which he explained his aims and ideals for the benefit both of performers and listeners. Little attention was, however, paid to these essays, and although they are valuable aesthetic treatises, most lovers of Wagner would gladly give them for the operas he might have written in the same time,--operas uniting the characteristics of "Lohengrin" and "The Valkyrie." Wagner's letters to Liszt and other friends show that he suffered tortures, and was often brought to the verge of suicide by the thought that, as a political refugee, he was unable to go to Germany to superintend the production of his works. His one consolation was that, as he put it, through the friendship of Liszt his art had found a home at Weimar at the moment when he himself became homeless. Weimar became, as it were, a sort of preliminary Bayreuth, to which pilgrimages were made to hear Wagner's operas. Liszt not only produced the "Flying Dutchman," "Tannhäuser," and "Lohengrin," but wrote eloquent essays on them, and in every possible way advanced the good cause. It has been justly said that by his efforts he accelerated the vogue of Wagner's operas fully ten years. He also helped him pecuniarily, and induced others to do the same. Never in the world's history has one artist done so much for another as Liszt did for Wagner during all the years of his exile in Switzerland. Few persons would consider residence in Switzerland (the usual home in those days of political refugees) a special hardship; nor would Wagner have considered it in that light except for the solicitude he felt for the children of his brain. Otherwise he greatly enjoyed life in that glorious country, and the Alpine ozone nourished and stimulated his brain. Moreover, from the creative point of view, it was an actual advantage for him to be away from the opera-houses of the great capitals. In Switzerland, except for a short time when he was connected with the Zurich opera, he heard no operatic music except such as his own brain created. Undoubtedly this helps to account for the astounding originality of the music-dramas he wrote in Switzerland.