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Source: 
p. 1, b. 1-21
p. 1, b. 1-21
p. 2, b. 22-43
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AI - Presentation autograph
A - Autograph
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GE1 - First German edition
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FES - Stirling copy
EE - English edition
EE1 - First English edition
EE3 - Revised impression of EE1
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AI - Presentation autograph
A - Autograph
GE - German edition
GE1 - First German edition
GE2 - Second German edition
FE - French edition
FE1 - First French edition
FED - Dubois copy
FES - Stirling copy
EE - English edition
EE1 - First English edition
EE3 - Revised impression of EE1
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  b. 20-21

Erasures and other traces visible in A demonstrate that initially Chopin noted the minim e1 sustained in bars 20-23 on the upper staff.  The laborious graphic alteration must have been undertaken to convey some vital information: that note, struck with the right hand at the beginning of bar 20, is then much more convenient to play when taken over and sustained with the left hand.  

Compare the passage in the sources»

category imprint: Corrections & alterations; Source & stylistic information

issues: Corrections in A

notation: Shorthand & other

Missing markers on sources: AI, GE1, GE2, FE1, FED, FES, EE1, EE3