Op. 45, Prelude in C♯ minor

A separate publication of the Prelude prepared shortly after FE1 and on its basis. The musical text was spread over as many as seven pages, and several dozen corrections of various importance were introduced, mainly missing accidentals added. A numer of new errors was also made in the process, some of them glaring. That fact, combined with the lack of small improvements so characteristic of Chopin, makes the composer's participation in the preparation of FE2 virtually impossible. 

A vast majority of corrections consist in adding obviously missing elements, such as e.g. three  for F and f in bars 29-30 or three  before the three last quavers in bars 31 & 37, or the quaver flag in bar 54. Also,  was moved before the right note (d¹) in bar 12 and another  removed before the last quaver in bar 85.

There are also changes that show incorrect understanding of the revised text, such as shifting the  mark to the end of bar 4, removal of the dot extending a¹ in bar 16, adding the erroneous cautionary  in bar 18, replacement of the correct  (c²) with the erroneous  (c²), as well as adjusting the note layout to erroneous rhythmic values in bar 48. That category also includes changes that do not formally affect the text, such as moving slurs that embrace L.H. quaver passages under the notes, e.g. in bars 37-50.

Some elements of notation present in FE1 were omitted from FE2: a tie sustianing B in bars 22-23,  in bar 38,  in bar 64, cresc. dashes in bars 65-66, dim. at the end of bar 79. Those are most probably accidental omissions (definitely so in the case of bars 64-66).

Beginning from 1860s, copies of FE2 featured the cover of the series Edition Originale. Oeuvres Complètes [...] de Frédéric Chopin published by Schlesinger's successor Brandus (at the moment of publication of the version of FE2 presented here the firm name was Brandus et Dufour).