Bach, Johann Christian. (1735-1782) Fuge für das Pianoforte oder die Orgel ... über die Buchstaben seines Namens BACH.Oblong folio. Engraved. [PN] 793. 6 pp. Terry p. 348 (incorrectly identified as the first edition; in fact, it was first published by Khnel in 1810). Reprinting from the original plates. A few light spots, spine reinforced with paper, outer edges somewhat nicked, else fine. The B A C H musical motive (B flat A C B natural) was frequently used by J. S. Bach, most famously in the last Contrapunctus of The Art of Fugue. His son Johann Christian also used