FÉTIS, François-Joseph. Set of two works: Histoire générale de la musique - Biographie universelle des musiciens. Paris: Firmin-Didot, 1866-1878. In 15 in-8 volumes. Unstained spines, rubbing with some loss to Histoire de la musique. Scattered foxing inside and on edges. Set of two works by Belgian composer, music critic and musicographer François-Joseph Fétis (1784-1871), composed as follows: - Histoire générale de la musique depuis les temps les plus anciens jusqu'à nos jours, Tome 1 à 5. Paris, Firmin-Didot, 1869- 1876. 5 volumes, In-8 format, green half-basane, spines with false nerves underlined by gilded stippling, boxes with double floral fillets, gilt initials. Approx. 500 pages per volume, with B&W score figures in the text. First edition of this in-depth analysis of the history of Western music, illustrated with numerous figures and scores in the text. - Biographie universelle des musiciens et bibliographie générale de la musique, second edition, Vol. 1 to 8 + 2 vols. of supplements (published under the direction of Arthur Pougin). Paris, Firmin-Didot, 1866 to 1878. In 8 volumes, in-8 format, half-red basane, smooth spines decorated with gilt and cold-stamped fillets, gilt fleurons, gilt lettering, cold-framed percaline boards. The 2 volumes of supplements are bound in half-tobacco basane, spines with cold-pinched faux nerfs adorned with a gilded lyre motif, gold lettering. Approx. 500 pages per volume, printed on two columns. Second edition "entirely recast and increased by more than half" of this reference work, which gives the biographies of numerous musicians in alphabetical order, augmented by its supplement published by a team of musicologists under the direction of music critic Arthur Pougin (1834-1921). A good set for these two major works of 19th-century musicology, complete in 5 and 10 volumes.