"He tried his first part over and over again with the most various intentions. At the passage in the dominant (E flat) at the close of the first part (a passage, properly speaking, the sonata has not; one might call it a charming clarinet phrase interwoven with the idea) Liszt said, 'It is marked legato. Now, would not one do it better _pp._ and staccato? Yet there is a leggieramente as well." He experimented in all directions. In this way it was given me to observe how one genius looks upon another and appreciates him for himself.
"'Now what is the second part of the first allegro like?' asked Liszt, and looked at it. It seemed to me simply impossible that any one could read at sight this thematic development, with octaves piled one on another for whole pages.
"'This is very difficult,' said Liszt, 'yet harder still is the coda,' and the combining of the whole in this close, here at this centrifugal figure (thirteenth bar before the end). The passage (in the second part, naturally in the original key of A flat), moreover, we must not play staccato; that would be somewhat affected; but we must also not play it legato; it is too thin for that. We'll do it spiccato; let us swim between the two waters.'
"If I had wondered at the fire and life, the pervading passion in the delivery of the first part by Liszt, I was absolutely astonished in the second part at his triumphant repose and certainty, and the self-control with which he reserved all his force for the last attack. 'So young, and so wise!' I said to myself, and was bewildered, absorbed, discouraged.
"In the andante of the sonata I learned in the first four bars more from Liszt than in years from my former good teachers. 'You must give out this opening just as Baillot plays a quartet; the accompanying parts consist of the detached semiquavers, but Baillot's parts are very good, and yours must not be worse. You have a good hand, and can learn it. Try it, it is not easy; one might move stones with it. I can just imagine how the hussars of the piano tear it to pieces! I shall never forget that it is through you I have learned to know the sonata. Now you shall learn something from me; I will tell you all I know about our instrument.'