Muzio Clementi was born in Rome in 1752, but when hardly more than a lad of fourteen was brought to London by an English gentleman, and London was henceforth his home until he died in 1832. He was a brilliant virtuoso, though he travelled but little to exhibit his powers; an excellent pedagogue; a very shrewd business man. Among his many compositions of all kinds, about sixty are sonatas for pianoforte. The first series of three was published in 1770 and is usually taken to determine the date at which the pianoforte began really to supplant the harpsichord. Concerning Clementi’s relation to the development of a new pianoforte technique we shall speak further on. Here we have to do with the musical worth of his sonatas. Clementi was born before Mozart and Beethoven. He outlived them both, not to mention Haydn, Weber and Schubert. Mozart, after a test of skill with him in Vienna, had little to say of him save that he had an excellent, clear technique. He remained primarily a virtuoso in all his composition; but on the one hand he undoubtedly influenced Mozart and Beethoven,--and not only in the matter of pianoforte effects,--while on the other he no less obviously held himself open to influence from them, particularly from Beethoven. His pianoforte sonatas show a steady development towards the curtailing of sheer virtuosity and the supremacy of emotional seriousness. In the early works, op. 2, op. 7, and op. 12, for example, he is obviously writing for display. The sonatas in op. 2 have but two movements. After that he generally composes them of three. The spirit of Scarlatti prevails, though it is almost impossible to point to any close relationship between the two men. The last movement of the second sonata in op. 26 perhaps resembles Scarlatti as definitely as any. But the fundamental difference between them, which may well obliterate all traces of the indebtedness of the one to the other, is that Clementi writes in the new melodic style. That he was a skilled contrapuntist did not restrain his use of the Alberti bass and other formulas of accompaniment. He composed with absolute clearness. The classical triplex form, with its conventional transitional passages, its clear-cut sections, and, above all, its well-defined thematic melodies, can nowhere else be better exemplified. What perhaps mars his music, or at any rate makes a great part of it tiresome to modern ears, is the employment of long scale passages in many of his transitional passages. They cannot but suggest the exercise book and the hours of practice which are back of them. The concise figures of Schobert, of Haydn and Mozart may sound thin, but, though they suggest sometimes the schoolboy, they spare us the school.