G. Henle urtext edition. Edited by Norbert Gertsch & Murray Perahia. Fingering by Murray Perahia. Interesting note: Freehand Reis left behind an account of Beethoven's reaction upon receiving and hearing the first published copies of this Sonata. There were an unusually large number of errors in the edition, which made him upset. But at the end of the first Allegro, the publisher had fabricated four additional measures. Upon hearing this played through, Beethoven jumped up and said, "Where the devil doyou find that?" Another reason to consider a fine urtext edition!