Carl Philipp Emmanuel, in the preface to his father’s _Vierstimmige Choralgesänge_ (“Four-part Hymn-tunes”), which he edited,(159) says that the world was accustomed to look for nothing but masterpieces from Bach. Some reviewers thought this praise exaggerated. But if the term “masterpiece” is restricted to works written during the years of Bach’s maturity(160) it is nothing less than the truth. Others have produced masterpieces in various forms which may be placed honourably by the side of his. For instance, certain Allemandes, Courantes, etc., by Handel and others are not less beautiful, though less richly wrought, than Bach’s. But in Fugue, Counterpoint, and Canon he stands alone, in a grandeur so isolated that all around him seems desert and void. No one ever wrote Fugues to compare with his; indeed, persons unacquainted with them cannot imagine what a Fugue is and ought to be. The ordinary Fugue follows a rule of thumb development. It takes a theme, puts another beside it, passes them into related keys, and writes other parts round them over a Continuo. Certainly this is Fugue: but of what merit? Persons who know no other not unnaturally hold the whole species in little esteem, and the player who hopes to make such commonplace material convincing will need all his skill and imagination. Bach’s Fugue is of quite another kind. It presents all the characteristics we are accustomed to in freer musical forms: a flowing and distinctive melody, ease, clarity, and facility in the progression of the parts, inexhaustible variety of modulation, purest harmony, the exclusion of every jarring or unnecessary note, unity of form and variety of style, rhythm, and measure, and such superabundant animation that the hearer may well ask himself whether every note is not actually alive. Such are the properties of Bach’s Fugues, properties which excite the admiration and astonishment of all who can appreciate the intellectual calibre their composition demands. How great a tribute of homage is due to work of this kind, which exhibits all the qualities which lend distinction to compositions in other musical forms! Moreover, while all Bach’s Fugues of his mature period have the foregoing properties in common, each is endowed with peculiar excellencies of its own, has its own distinctive individuality, and displays a melodic and harmonic scheme in keeping with it. The man who can play one of Bach’s Fugues is familiar with, and can play, one only; whereas knowing one, we can perform portfolios of Fugues by other performers of Bach’s period.