The letter from Paganini reads in part translated:
I am extremely sorry not to have been able to satisfy Her Majesty, the Empress (of Austria) on account of my unexpected illness. It will make me unhappy all my life if I can not have the pleasure of expressing my deep gratitude through you to her from whom I have received so much honor and kindness ... I shall then meet with her favor.
In sincere friendship,
your obedient servant,
First violinist to His Majesty, the Emperor