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b. 7

composition: Op. 28 No. 22, Prelude in G minor

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In the manuscripts this bar is marked in an abridged manner as repetition of the preceding one.

category imprint: Differences between sources

issues: Abbreviated notation of A

b. 17-19

composition: Op. 28 No. 22, Prelude in G minor

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In A (→FC) there are successive letters of the alphabet written under b. 17-24, which were then used to mark b. 25-32 in an abridged manner.

category imprint: Source & stylistic information

issues: Abbreviated notation of A

b. 25-32

composition: Op. 28 No. 22, Prelude in G minor

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In A (→FC) these bars are marked in an abridged manner with letters from a to h as repetition of b. 17-24.

category imprint: Source & stylistic information

issues: Abbreviated notation of A

b. 37

composition: Op. 28 No. 22, Prelude in G minor

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In A this bar is added on a stave below; the place in which it should be inserted is also marked. The addition of the bar could have been related to the changes of the rhythmic values of the final cadence, which was initially a bar longer.
In FC the bar was marked in an abridged manner as repetition of the previous one. 

category imprint: Differences between sources; Corrections & alterations; Source & stylistic information

issues: Corrections in A , Fontana's revisions

b. 39-40

composition: Op. 28 No. 22, Prelude in G minor

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The L.H. octaves at the beginning of these bars are notated in EE in an abbreviated form, with 8.

category imprint: Source & stylistic information

issues: EE revisions