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p. 2, b. 24-42
p. 1, b. 1-23
p. 2, b. 24-42
p. 3, b. 43-64
p. 4, b. 65-90
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FCI - Fontana's copy I
A - Autograph
FC - Fontana's copy
FE - French edition
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FE2 - Corrected impression of FE1
FED - Dubois copy
FEJ - Jędrzejewicz Copy
FES - Stirling copy
FESch - Scherbatoff copy
GE - German edition
GE1 - First German edition
GE2 - Revised impression of GE1
GE3 - Corrected impression of GE2
EE - English edition
EE1 - First English edition
EE1a - Corrected impression of EE1
EE2 - Revised impression of EE1a
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FCI - Fontana's copy I
A - Autograph
FC - Fontana's copy
FE - French edition
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FE2 - Corrected impression of FE1
FED - Dubois copy
FEJ - Jędrzejewicz Copy
FES - Stirling copy
FESch - Scherbatoff copy
GE - German edition
GE1 - First German edition
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GE3 - Corrected impression of GE2
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EE2 - Revised impression of EE1a
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  b. 33

In A (→FE) there are only 3 flats before the 1st chord – e2c2 in the R.H. and a1 in the L.H. In FC and EE1 lowering c1 to c1 and a cautionary one before a were added, while in GE and EE2 a cautionary  before e1 was also added.
The necessary  lowering c1 to c1 was added in FED.

Compare the passage in the sources»

category imprint: Interpretations within context; Differences between sources

issues: Annotations in teaching copies, EE revisions, Annotations in FED, Accidentals in different octaves, Cautionary accidentals, Fontana's revisions, Inaccuracies in A, Errors repeated in FE

notation: Pitch

Missing markers on sources: A, FC, FE1, FE2, FED, FEJ, FES, FESch, GE1, GE2, EE1, EE2, FCI, GE3, EE1a