There are question marks under the 3rd crotchet in bars 16 and 18 in A. Written in crayon, they probably mean the engraver's doubts as to the correct reading of the manuscript. In bar 16 this could be the question of the presence of the note e
1 in the L.H. chord and in bar 18 – the note e1, suggested by a 
at that height and by possible merging of the note with the ending of the 
.
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category imprint: Source & stylistic information
issues: Foreign hand additions in manuscripts
notation: Shorthand & other