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Source:
p. 5, b. 53-63
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We preserve the double flats written in A over the 
signs, although they are not necessary from the formal point of view. GE1 (→FE→EE) did not include them. In addition, all editions overlooked the wavy lines after the signs and GE1 (→FE→EE) omitted also the very sign in the part of the L.H. (the latter is unseeable in A, in which its presence, however, undoubtedly results from the inserted wavy line and 
).
Compare the passage in the sources»
category imprint: Differences between sources
issues: GE revisions, Cautionary accidentals
notation: Ornaments
Missing markers on sources:
A, Morch, FE1, FE2, FED, FEJ, FES, GE1, GE1a, GE2, EE1, EE2, EE3