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b. 49-50

composition: Op. 26 No 2, Polonaise in E♭ minor

..

In FE (→EE,GE1) there are no portato articulation signs over the chords – dots under the slur (the slur starts only in bar 50). It is a result of Chopin's mistake in the abbreviated notation of this bar and simplified correction of this error in FE.

category imprint: Differences between sources

issues: Inaccuracies in FE , GE revisions

b. 49

composition: Op. 26 No 2, Polonaise in E♭ minor

No slurs in A

Slurs in FE (→GE,EE)

..

The absence of slurs in A is an evident oversight of Chopin, who did not entirely consider which elements of notation of this bar should be written and which are already subject to the abbreviated indication of this and the subsequent bars – cf. the next note. The slurs were added in the proofreading of FE1, most probably on the basis of Chopin entry in the proofreading copy. 

category imprint: Differences between sources

issues: Authentic corrections of FE , Inaccuracies in A

b. 50-52

composition: Op. 26 No 2, Polonaise in E♭ minor

category imprint: Source & stylistic information

issues: Abbreviated notation of A

b. 51

composition: Op. 26 No 2, Polonaise in E♭ minor

..

The flats restoring A and a were added in proofreading FE (→EE,GE).

category imprint: Interpretations within context; Differences between sources

issues: Authentic corrections of FE

b. 53

composition: Op. 26 No 2, Polonaise in E♭ minor

in A

No marking in FE (→GE,EE)

..

The absence of  in FE (→GE,EE) is most probably a result of engraver's inattention. Similarly in bars 109 and 157.

category imprint: Differences between sources

issues: Errors in FE