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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. 38

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

Half-bar slur in A (→FCGE)

Slur from B1-B in FE

No slur in EE

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The later starting point of the slur in FE resulted from an inaccurate interpretation of A. The missing slur in EE is an oversight, like in previous bars.

category imprint: Differences between sources

issues: Inaccuracies in FE , Errors in EE

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

b. 40

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

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The crossings-out visible in A reveal that the chords in b. 40 were initially written as dotted minims.

category imprint: Corrections & alterations; Source & stylistic information

issues: Corrections in A , Deletions in A , Main-line changes

b. 40

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

category imprint: Corrections & alterations; Source & stylistic information

issues: Corrections in A , Deletions in A , Accompaniment changes , Bass register changes