having no discoverable connection with what precedes or what follows it. In breadth, dignity, and expressiveness it surpasses anything that the composer had hitherto produced. From this time forth the symphony steadily grew under Haydn's hands; the form was enlarged, the orchestration was varied, the timbres of the different instruments were studied and instrumental effects gradually assumed an importance that increased with each succeeding symphony. But his greatest symphonies were not written until the period of the Salomon concerts. In the meanwhile Mozart had appeared upon the scene. Haydn's first symphony was produced when Mozart was three years old, and the latter died in the very year in which Haydn's connection with the Salomon concerts began. That Haydn influenced Mozart's early works is beyond question; that Mozart in turn, influenced Haydn later, is equally indisputable. [Illustration: JOSEPH HAYDN. From an engraving by J. E. Mansfield, published by Artaria, in Vienna, 1781. Haydn in his forty-ninth year.] In "Le Matin," before alluded to, the second violins play with the first, and the viola with the basses almost through the whole of the first movement. The slow movement has no wind instruments whatever. In the minuet, though, there is a long passage for wind instruments only, and in the trio is an extensive and florid solo for bassoon. Haydn treated the strings in this same confined manner, and the wind after this solo fashion for some twenty years. Then came an effort to make the strings more independent and to pay attention to the peculiar qualities of the viola and violoncello. In the symphony in E-minor (Letter I) the wind is given long holding notes while strings sustain the subject. This was the first step toward greater freedom of orchestration in Haydn's symphonies; but it was not until his "Oxford" symphony that he broke wholly with the past. It was written in 1788, the same year in which Mozart produced his three greatest symphonies. This work is in his mature style, and the orchestration is delightfully clear, flexible and fresh. If he had written no more symphonies after this, however, he would not have attained to the rank he has won as a symphony composer. His fame in this walk of his art was assured by the twelve symphonies he wrote for Salomon after 1790. In these he reached his highest point. His mastery of form was perfected, his technical skill was unlimited, and he ventured into bold harmonic progressions that were little short of daring, for his time. His orchestra had been enlarged to two flutes, two oboes, two bassoons, two horns, two trumpets and drums, and in his three last symphonies, the two in D-minor and the one in E-flat, two clarinets appear. It is in these twelve symphonies that the influence of Mozart is clearly manifested. The bass has attained to independence; the violas no longer duplicate it except for certain effects; the second violins have a free motion of their own;