and struggle, they were also years with free time to devote to painting, and a time of great productivity and artistic growth. Daumier exhibited regularly at the official Salon, although in this period of time it was only held once every two or three years. He suffered a serious illness in 1858. By 1863 Daumier was selling his furniture to raise funds and he left the Ile-Saint-Louis and moved to a succession of lodgings and apartments in Montmartre, losing contact with many friends and associates. Le Charivari presented him with a new contract in 1864 and he returned to making caricatures and cartoons for a living, and found a receptive audience when he did. By the mid 1860s, a few collectors were starting show some interest in his drawings and watercolors. Later years: 1865–1879 Daumier spent the summer of 1865 in Valmondois, north of Paris with Théodore Rousseau, who was in declining health, and soon he left Montmartre permanently and rented a small cottage in Valmondois, where he lived for the remainder of his life. Although he had touched on the theme as early as 1850, he started working on Don Quixote in earnest about 1866 or 1867, painting many canvases on the subject over the next few years. He started experiencing failing eyesight around 1865 or 1866 which progressed with time, although he was still producing drawings and poster designs as late as 1872. He continued to exhibit at the Paris Salons for several years, although the canvases he submitted were often over ten years old. In 1864 he had made 100 lithographs and received 400 francs a month, but with very little time to paint. In 1866 he was producing 70 lithographs a year and earning 200 francs a month. In 1870, during the Franco-Prussian War, the newspapers stopped publishing and Daumier was signing promissory notes for his debts. His loyal friend, Jean-Baptiste-Camille Corot, secretly bought the house Daumier had been renting in 1868 and bestowed it to him as a surprise, in a letter reading: "Dear old comrade: I had a little house at Valnondois, near Isle-Adam, which was of no use to me. It occurred to me to offer it to you, and finding this was a good idea, I had it registered with the notary. It's not for your sake I am doing this, but to annoy the landlord." Although he was living a humble