In CLI the entire bar is written one octave lower. In the manuscripts also the adjacent bars are entirely written one octave lower, yet both bar 14 and 16 are included under an octave sign. Therefore, there is no doubt that bar 15 was also meant to be marked like that. The copyist must have totally lost it, as at the beginning of bar 15 he even wrote loco, with which an end of the octave sign was designated back then, while in bar 16 he started a new indication.
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category imprint: Interpretations within context; Differences between sources
issues: Errors of CLI
notation: Pitch