Friedrich Kalkbrenner seriously intended to become Kalkbrenner's pupil, but he changed his mind after this encounter with the celebrated man: Clara Schumann, wife of composer Robert Schumann, and herself an eminent pianist and composer, spent several months in Paris during the year 1839. She met many of the Parisian pianists, Kalkbrenner among them. In a letter home to her father, piano pedagogue Friedrich Wieck, she wrote: German poet and satirist Heinrich Heine in his "Letters on Music from Paris (1840–47)" wrote with biting wit on musical life and musicians in the French capital. Kalkbrenner was the target of some of Heine’s more
Conrad Graf of standing up to the violence that Liszt inflicted on it during his more impassioned moments of playing. Friedrich Wieck wrote in his diary in during Liszt's 1838 visit to Vienna, "We heard Liszt today at Conrad Graf's who was sweating as his piano did not survive the great duel—Liszt remained the victor." Wieck described another concert on the same visit in which Liszt "destroyed" two Grafs, as well as an Erard piano lent to him by Sigismond Thalberg. In 1840, Graf gave one of his firm's grand pianos as a gift to the young piano virtuoso Clara Wieck (Friedrich's