Q2. What is the main cause of the similarity that Rosenblum perceived?
From this it is possible to conclude that since two thirds of the large differences in speed between the early editions are eventually resolved, it seems very likely that Czerny and Moscheles indeed influenced each other, and that this is the main cause of the similarity that Rosenblum perceived, which is primarily found in the later editions.
Q3. What is the earliest information on the sonatas?
The earliest information indicating a publication date is from a subscription announcement in Haslinger’s publication catalogue from December 1828, which announces that ‘from the first series, which contains the sonatas for solo piano, already eight have been published’.41 On 12 January 1831, the Allgemeine musikalische Zeitung reported that 14 sonatas had been published, including WoO 47, opp. 13, 26, 27 no. 1 and 31 no. 2.42
Q4. What is the speed of the Presto in Haslinger?
A good example is the concluding Presto of op. 27 no. 1, for which Czerny’s only other metronome mark is = 120 in Haslinger, while the Simrock edition contains a much slower = 96, the same speed that is found in Moschsles’s Cramer edition.