The two visible in CDP slurs in the L.H., each embracing 6 notes, are almost certainly an addition of the copyist, who marked the original grouping of semiquavers in this way. It was necessary, as the two authentic ties, indicating the correct grouping, were replaced in CDP with one, which enabled writing the 2nd half of the bar as repetition of the first. Therefore, we consider these slurs as a part of an abbreviated notation in this bar. The copyist used a similar measure in bars 42-43.
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category imprint: Interpretations within context; Differences between sources
notation: Slurs