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Source:
p. 3, b. 35-48
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The cautionary 
to e1 is missing in GE (a similar situation can be found in b. 71). In both places the accidentals were probably entered into FE at the stage of proofreading, since they are absent in b. 278 and 304, which were almost certainly not written out in full in the manuscripts, only marked as a repetition of b. 45 and 71. The absence of respective amendments in the final part of the Polonaise may point to Chopin as author of those additions.
Compare the passage in the sources»
category imprint: Differences between sources
issues: Cautionary accidentals, Authentic corrections of FE
notation: Pitch
Missing markers on sources:
GE1, GE2, FE1, FE2, EE1, EE2, EE3, FES