` :Well, well, very interesting. ``The Musical Box`` was far from being his only published work. The Library of Congress Firstsearch catalog turns up 140 publications (including many duplications), starting in 1861 with an exercise book, The Most Important Cadences & Modulations through the Major & Minor Keys, with Harmonised Scales, etc., and a collection of Six Operatic Recitals for Pianoforte. These were mostly published in London (a very small number from Germany) and almost all are for the piano, either solo or duet. There is one exception for string quartet, and an arrangement of Auf Wiedersehen ... for violin & piano, Easily arranged & fingered (London: E. Ascherberg, 1901). He also published a theory book, ''Harmony and Modulation on an Entirely New Principle, etc. (Montreal: W. Drysdale and Co., 1896; London: C. Jefferys & Son, 1897). :There are other Liebichs in music history, in particular one Karl Liebich who was director of the German Opera in Prague in the eatly 19th century, and Gottfried Siegmund Liebich, who apparently died in 1736, but whether Immanuel was any relation, I cannot say. Immanuel's publications thin out after 1890 and, although I find several more up to 1913 (not counting recent reprints), I would guess that these later publications may be posthumous. He must certainly have been born before 1840, and probably died in the 1890s or early 1900s. If this web posting: :: : refers to the same person (as seems likely), then his full name was Immanuel Christoph Albert Erdmann Liebich, and he was born in Silesia or Prussia in 1823, was married in London in 1856 to Agnes Julie Mehlhorn, and they had at least two children, Rudolf (christened in 1869), and Franz, However, since this Franz seems to have been listed in Who's Who already by 1860, there may be something wrong with this evidence. I have checked the first edition of Grove's Dictionary (vol. 2, 1880, which includes entires beginning with L), with no result. Still, it's a start.—  `