In A1 
is the only performance indication in this and the next bars until 
in b. 57 (except for a few R.H. slurs in b. 52-54). It cannot be ruled out that it could have been influenced by the layout – b. 49-56 fill one line of A1 and both the previous and the next lines abound in such indications. The missing top part of the second 
mark makes the interpretation of this marking unobvious; it could also be 
. A very characteristic horizontal line, common for both letters (cf., e.g. four on the 1st page of A in the Scherzo in B
Minor, Op. 31) is an argument in favour of .
In the main text we give the mark of the later version.
Compare the passage in the sources »
category imprint: Graphic ambiguousness; Differences between sources
notation: Verbal indications