The moment of pedal depression at the transition between bars 8-9 and analogous bars is not marked in the uniform manner in the sources – 
appears at the beginning of bars 9 and 13, but at the end of bar 22. Similar differences occur further on in the text as well. Even if we assume that this was the result of inaccurately notating or reading autographs, it is difficult to determine without seeing those autographs which notation complies with Chopin's intentions As in each one of those places both versions make sense, in the main text we propose the variant solution everywhere, in which the mark without brackets indicates the version that is recommended from the practical point of view.
Compare the passage in the sources»
category imprint: Interpretations within context; Editorial revisions
issues:
notation: Pedalling