71 cantata, has a handwritten note by Bach on the front page. Clavier-Übung I Bach's Six Partitas, BWV 825–830, for harpsichord, were published in instalments from 1726 to 1730: Autumn 1726: Partita No. 1 in B-flat major, BWV 825. Easter 1727: Partita No. 2 in C minor, BWV 826. Michaelmas 1727: Partita No. 3 in A minor, BWV 827. 1728: Partita No. 4 in D major, BWV 828. 1730: Partita No. 5 in G major, BWV 829. 1730: Partita No. 6 in E minor, BWV 830. In 1731 these partitas were collectively published as Clavier-Übung ("Keyboard Exercise"). Publication According to an announcement published in May 1730, it was originally planned to publish seven suites. In 1774 Carl Philipp Emanuel Bach, son of Johann Sebastian, sold a print of from his father's personal library to Johann Nikolaus Forkel. In 2008 Andrew Talle identified of the Austrian National Library as the that changed hands in 1774. Previously, Bach scholars had (tentatively) identified Bach's of as either of the Music Division of the Library of Congress (e.g. Peter Wollny in 1996) or of the British Library (e.g. Walter Emery in 1952, and Richard D. P. Jones in 1978, 1988 and 1997). Canon a 4 Bach's "Canon mit 4" (canon for four voices), BWV 1074, was published in Georg Philipp Telemann's in 1728. This canon was also published with two solutions in Johann Mattheson's Der vollkommene Capellmeister in 1739, and with three solutions in Volume 3 of Lorenz Christoph Mizler's in 1747. Clavier-Übung II The second volume of the Clavier-Übung was first published in 1735, soon followed by a reprint with several corrections. It contained two compositions, specified for performance on a two-manual harpsichord: Concerto nach Italienischen Gusto (Italian Concerto), BWV 971 Ouvertüre nach Französischer Art (French Overture), BWV 831 Publication Clavier-Übung II was printed in Nürnberg by Christoph Weigel. In the second printing pages 20 to 22 were replaced by new engravings. K.8.g.7 from the British Library was Bach's : it is a copy from the first print run with more than hundred corrections in Bach's hand. Spiritual songs and arias from Schemelli's Musicalisches Gesang-Buch Georg Christian Schemelli's Musicalisches Gesang-Buch (musical songbook), commonly known as Schemellis Gesangbuch, contains 954 song texts, 69 of which, BWV 439–507, are printed with a setting for singing voice and thoroughbass. Not all 69 melodies were composed by Bach, but he provided (or "improved") an accompaniment for all