In Geibel's Gesammelte Werke, VI. 106-74, Geibel wrote the libretto for Felix Mendelssohn in 1846.

He had intimate relations with Mendelssohn during the years of the latter's stay in Duesseldorf.

Grove moralises thus on Mendelssohn with sane philosophy: "He was never tried by poverty, or disappointment, or ill-health, or a morbid temper, or neglect, or the perfidy of friends, or any of the other great ills which crowded so thickly around Beethoven, Schubert, or Schumann.

The news was told to Mendelssohn without any preparation; with a scream he dropped senseless; it was said that a blood-vessel had broken in his brain.