HEINRICH MOLLENHAUER, born on September 10, 1825, at Erfurt, was from his fourth year taught piano and violin playing, and when only a half-grown boy he made, with his brothers, under his father’s guidance, a concert tour through Germany. He later devoted himself, under Knoop’s direction, to Violoncello playing with great success. Mollenhauer belonged for three years, from 1853, to the Royal band at Stockholm, and then turned to New York. After he had travelled through the North American States as a Concert-giver, he settled down, in 1867, at Brooklyn, and founded there a music school. In the sphere of chamber music the best performer was the Cellist of the formerly famous MÜLLER STRING QUARTET, whose name was THEODORE. He was born on September 27, 1802, in Brunswick, and died there on May 22, 1875. He is described as the very soul of the Quartet Band, which with his brothers Carl (1st Violin), Georg (2nd Violin), and Gustave (Tenor), he so carefully kept together for so many years, the most brilliant period of which was from 1831-1855. During this time the brothers Müller undertook journeys into Germany, Holland, Denmark, and Russia, which were crowned with fame. They were also heard in Paris. As is known, the Müller String Quartet was continued by the sons of Charles, the eldest of the brothers, who belonged as Concert Master to the Ducal Kapelle of Brunswick. The Violoncellist of the junior Quartet Band was-- WILLIAM MÜLLER, born on June 1, 1834, in Brunswick. He had his uncle, Theodore, as his master. After he had been working with his brothers in the Meiningen orchestra, as well as in Wiesbaden and Rostock, he entered the Berlin Court Kapelle as solo cellist, and also undertook the Cello instruction in the Royal High School for Music. In this position he remained three years, when he went to America. From that time there is no more account of him. His pupil, EUGEN SANDOW, born on September 11, 1856, in Berlin, occupied himself from his sixth to his eighth year, under the direction of his father, with violin playing; gave it up however in favour of the Violoncello, and had as his next teacher the royal chamber musician, A. Rohne. In 1870 he was taken into the High School for Music, and was there, from 1873 to 1876, Müller’s pupil. In April of the year 1879 ensued his appointment as Chamber Musician in the Royal band. * * * * * Since the beginning of the present century Hamburg has been distinguished by excellent cellists. Foremost must be brought forward here-- JOHANN NIKOLAUS PRELL. He was born on November 6, 1773, in Hamburg, and earned the thanks of the musical world there especially by the institution of regular Quartet Academies. He died on March 18, 1849. His son--