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b. 135

composition: Op. 21, Concerto in F minor, Mvt III

..

It is difficult to say what the ccrotchet (grace note?), written in A over the d1-esecond at the beginning of the bar, means. It is not corresponded by any note in Morch, it was not included in the editions either. In this situation, we regard this inexplicable, from the point of view of melody and harmony, note as a mistake.
Perhaps it was to be an e3, sustained from the previous bar, in which the e3 minim is provided with an additional curved line. However, the curved line is not combined with the discussed note, hence we do not include this possibility, doubly hypothetical, in our system.  

category imprint: Source & stylistic information

issues: Errors of A

b. 167

composition: Op. 21, Concerto in F minor, Mvt III

..

The cautionary naturals before g2 and gwere added in GE (→FEEE). It could have been performed at Chopin's request.

category imprint: Differences between sources

issues: Authentic corrections of GE

b. 191

composition: Op. 21, Concerto in F minor, Mvt III

c1-e1-a1 in A (→GE)

a-c1-a1 in FE (→EE)

..

The version of FE (→EE) is undoubtedly a Chopin improvement, introduced in the proofreading of FE1.

category imprint: Differences between sources; Corrections & alterations

issues: Authentic corrections of FE

b. 194

composition: Op. 21, Concerto in F minor, Mvt III

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In A (→GE1FE) there are no accidentals before the last two quavers. This patent inaccuracy was corrected in EE and GE2.

category imprint: Interpretations within context; Differences between sources

issues: EE revisions , GE revisions , Omission of current key accidentals , Inaccuracies in A

b. 195

composition: Op. 21, Concerto in F minor, Mvt III

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In A there is no  lowering c1 to c1. This patent oversight was corrected already in GE1 (→FEEE, →GE2), perhaps by Chopin. Moreover, a cautionary  before cwas added in the next bar

category imprint: Interpretations within context; Differences between sources

issues: Omission of current key accidentals , Errors of A , Authentic corrections of GE