Both String Quartets were performed privately in Berlin by Joachim and his colleagues. They were played for the first time in public; that in A minor in Berlin at the Joachim Quartet concert of October 18 from the manuscript; that in C minor at the Hellmesberger concert of December 11 in Vienna from the printed copies. [Illustration: BRAHMS AT THE AGE OF 40.] The appearance of these two works as Op. 51, Nos. 1 and 2, forms, as we have said, another and important landmark in the development of Brahms' career. The String Quartet holds a position of peculiar significance in the art of music, and a composer, by selecting this form for the exercise of his powers, exposes them to the most unfailing test to which his calibre as a musician can possibly be submitted. He must possess not only fertility in the production of purely musical concentrated ideas, and ideas capable of development; the power to develop them, which means many things, and the capacity for shaping them into clear structure; but he must be able to express them with the most bare and simple musical means, with four strings. From the rapid effects of strong and strongly contrasted sensation producible by the pianoforte, or the varied tone-colour of the orchestra, he is precluded. With his four strings he can interest, delight, touch, but hardly astonish his hearers. The String Quartet is absolute music in its purest form, and but few works in this domain can survive their birth unless they be destined to attain a long life. The means are perfect for the end, but this is difficult of achievement; only the quartet of a master has much chance of being heard after its first few performances. It will be evident to the reader that Brahms was fitted by many essential characteristics of his genius for success in this branch of art, though it cannot cause surprise that one of his great qualities, the power of waiting for results, should have strengthened his fastidiousness in accepting as final the fruits of his studies in a form which had been brought to ideal perfection by Haydn and Beethoven, each in their day. On the great musicianship manifest in Brahms' quartets, on his mastery over his means, his power of completely balancing his four parts, of making each a separate individuality whilst all blend harmoniously as equal constituents of an organic whole, it is only necessary to insist here in so far as these qualities are elements in another feature which pre-eminently marks our master's chamber music for strings: the extraordinary beauty of its structure. Throughout the three quartets and two quintets for strings composed by Brahms there is not only no mere passage writing, but it would be difficult to point to a single note that could be called superfluous. Each seems to have been placed with loving care by the master hand of the great musical architect, the artist builder, as an essential part of the whole large design. When we