d,
"Pity the lad has not a better tournure." However, the affair did not
pass off altogether without unpleasant incidents:--

The members of the orchestra [Chopin writes to his friend
Titus Woyciechowski] showed me sour faces at the rehearsal;
what vexed them most was that I wished to make my debut with
a new composition. I began with the Variations which are
dedicated to you; they were to be followed by the Rondo
Krakowiak. We got through the Variations well, the Rondo, on
the other hand, went so badly that we had to begin twice from
the beginning; the cause of this was said to be the bad
writing. I ought to have placed the figures above and not
below the rests (that being the way to which the Viennese
musicians are accustomed). Enough, these gentlemen made such
faces that I already felt inclined to send word in the
evening that I was ill. Demar, the manager, noticed the bad
disposition of the members of the orchestra, who also don't
like Wurfel. The latter wished to conduct himself, but the
orchestra refused (I don't know for what reason) to play
under his direction. Mr. Demar advised me to improvise, at
which proposal the orchestra looked surprised. I was so
irritated by what had happened that in my desperation I
agreed to it; and who knows if my bad humour and strange mood
were not the causes of the great success which my playing
obtained.

Although Chopin passes off lightly the grumbling and grimacing of the
members of the orchestra respecting the bad writing of his music, they
seem to have had more serious reasons for complaint than he alleges
in the above quotation. Indeed, he relates himself that after the
occurrence his countryman Nidecki, who was very friendly to him and
rejoiced at his success, looked over the orchestral parts of the Rondo
and corrected them. The correction of MSS. was at no time of his life
a strong point of Chopin's. That the orchestra was not hostile to him
appears from another allusion of his to this affair:--

The orchestra cursed my badly-written music, and was not at
all favourably inclined towards me until I began the
improvisation; but then it joined in the applause of the
public. From this I saw that it had a good opinion of me.
Whether the other artists had so too I did not know as yet;
but why should they be against me? They must see that I do
not play for the sake of material advantages.