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b. 156-157

composition: Op. 38, Ballade in F major

Slur in A (→FE)

No slur in GC (→GE) & EE

..

The lack of slur under the bass progression results most likely from an oversight of the copyist in GC (→GE) and the engraver of EE.

category imprint: Differences between sources

b. 156

composition: Op. 38, Ballade in F major

Dashes under L.H. in A (→GC)

No dashes in FE, EE & GE

Dashes between staves suggested by the editors

category imprint: Differences between sources

issues: Errors in FE , Errors in EE , Errors in GE

b. 157

composition: Op. 38, Ballade in F major

Indications in A (→EE,GCGE)

No indications in FE

..

The lack of sempre forte nad marcato indications results certainly from an oversight by the engraver of FE. He omitted all verbal indications in the line comprising bars 156-160.
The designation sempre forte is placed in the sources around the middle of the bar, so that its beginning falls under the third (AGCGE) or fourth (EE) semiquaver. In the editors' opinion it is probably an instance of Chopin's mannerism of writing markings inside the domain of their application, hence we put the indication at the beginning of the bar in the main text. It bears no practical implication anyway, for the indication basically confirms the dynamics effective in the entire Presto.
#Wa replaced the word forte with the  sign.

category imprint: Differences between sources

issues: Errors in FE

b. 158

composition: Op. 38, Ballade in F major

in middle of bar in A (→FE,EE)

 at beginning of bar in GC (→GE)

..

The earlier pedal pressing notated in GC (→GE) results undoubtedly from the copyist's error.

category imprint: Differences between sources

issues: Inaccuracies in GC

b. 158-166

composition: Op. 38, Ballade in F major

..

In A (→GC) bars 158, 160, 162-164 and 166 were briefly written with a repetition mark of the previous bar.

category imprint: Source & stylistic information

issues: Abbreviated notation of A