His bulky letters reveal his love for and dependence on Pierre to whom he confided endless details about his health, exercise regimes and work, explaining how he would measure the time he took to draw by playing Beethoven symphonies on the gramophone.

ECONOMIST: Post-Impressionists

But the jazz melodies of Billie Holiday and the lush symphonies of Beethoven were like a visceral experience for me.

CNN: Living with a 'borrowed brain'