The special feature of his style, which the critic just quoted calls an "important idiosyncrasy," was his mastery of chromatic modulations. The use of chromatic harmonies is characteristic of the romantic school, its further development being seen in the "Tristan und Isolde" of Wagner. It may be well to add, for the further enlightenment of the lay reader, that chromatic modulation is the secret of that flexibility of style and largeness of tonal atmosphere which are found in Wagner's works; and for the first determined movement in this direction we must thank Spohr. Nevertheless, Spohr's use of chromatic modulations was wholly unlike that of later composers. As Emil Naumann says, "If Salieri is justified in saying of certain composers, who use venturesome skips in their modulations, that they are like a man who jumps through the window when the door is open, we may well say of Spohr that he passes the open door at least six times before he decides upon entering." This circumlocution is unquestionably the result of Spohr's endeavor to place upon his natural impulses the curb of the Mozartean polish. The outcome of his self-restraint is the reduction of his operas to a dead level of sweetness that becomes wearisome. It was this never-ceasing mellifluous quality that forced itself upon the attention of Chorley and made even that eminent lover of Bellini cry for something else besides candy. Says Chorley: "The most graceful Italian garden, where 'grove nods to grove--each alley has its brother,' is not arranged with a more perpetual reference to reflexion, parallel, reply, repetition, than the largest or the least piece of handiwork put forth by this arithmetically orderly composer. Further, Dr. Spohr's vocal ideas and phrases have, for the most part, a certain suavity and flow, belonging to the good school of graceful cantabile, eminently commendable, when not indisputably charming. But it is difficult, nay, I may say at once, impossible, to cite any motive from his pen, which, by its artless vivacity, seizes and retains the ear; and there are few of his melodies that do not recall better tunes by better men." This sweet level of cantilena undoubtedly also impressed itself on Schumann, who was expressing his admiration of Spohr when he said: "As he looks at everything as though through tears, his figures run into each other like formless, etherial shapes, for which we can scarcely find a name."