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b. 1

composition: Op. 25 No 4, Etude in A minor

 in A (→FE) & GE2 (→GE3)

 in #CF

 in GE1 & EE

..

According to us, placing  in A only at the beginning of bar 1 is an example of Chopin's using a manner of putting the indications inside, and not at the beginning of, the area of their validity, which is not used at all today. It is also possible that Chopin feared the suggestion that the indication refers only to the L.H., yet this risk also seems to be negligible in our times. In FC Fontana put the sign slightly earlier, so that in GE1 it was printed at the very beginning of the piece. The interpretation was reviewed in GE2 (→GE3).

category imprint: Differences between sources

issues: GE revisions , Inaccuracies in FC , Centrally placed marks

b. 1

composition: Op. 25 No 6, Etude in G♯ minor

Title & dedication in FC

Title & dedication in GE1

Title & dedication in GE2 (→GE3)

Title & dedication in FE

Title & dedication in EE1 & EE3

Title in EE2

Our suggestion

..

In the main text we give the title and dedication after the title page of the entire opus in FC and FE.
See the Etude in A major, No. 1.

category imprint: Differences between sources

issues: EE revisions , Dedications , GE revisions

b. 1

composition: Op. 25 No 7, Etude in C♯ minor

Title & dedication in GC

Title & dedication in GE1

Title & dedication in GE2 (→GE3)

Title & dedication in FE

Title & dedication in EE1 & EE3

Title in EE2

Our suggestion

..

In the main text we give the title and dedication after the title page of the entire opus in GC and FE.
See the Etude in A major, No. 1. 

category imprint: Differences between sources

issues: EE revisions , Dedications , GE revisions

b. 1

composition: Op. 25 No 6, Etude in G♯ minor

in FC, EE & GE2 (→GE3)

in FE & GE1

..

The use of  time signature surprises only in GE1, as FE did not use the  indication in the Etudes – contrary to the manuscripts – even once, neither in Op. 25 nor in Op. 10 and the Etude in F minor, Dbop. 36 No. 1 (cf. also the Impromptu in A major, Op. 29). In any case, the correctness and authenticity of the  time signature is undeniable with respect to the compatible version of FC and EE. The correct time signature was returned in GE2 (→GE3).

category imprint: Differences between sources

issues: Changes of metre , Inaccuracies in GE , Inaccuracies in FE , GE revisions , 4/4 or 2/2

b. 1

composition: Op. 25 No 7, Etude in C♯ minor

Fingering written into FES

No teaching fingering

..

The characteristic, expressive Chopin fingering was written by the composer in FES.

category imprint: Differences between sources

issues: Annotations in teaching copies , Annotations in FES