was nearly at an end by then, but they continued to share opinions in occasional correspondence. When Edgar Degas invited Whistler to exhibit with the first show by the Impressionists in 1874, Whistler turned down the invitation, as did Manet, and some scholars attributed this in part to Fantin-Latour's influence on both men. Portraits The Franco-Prussian War of 1870 fragmented the French art community. Many artists took refuge in England, joining Whistler, including Camille Pissarro and Monet, while Manet and Degas stayed in France. Like Whistler, Monet and Pissarro both focused their efforts on views of the city, and it is likely that Whistler was exposed to the evolution of Impressionism founded by these artists and that they had seen his nocturnes. Whistler was drifting away from Courbet's "damned realism" and their friendship had wilted, as had his liaison with Joanna Hiffernan. Whistler's Mother By 1871, Whistler returned to portraits and soon produced his most famous painting, the nearly monochromatic full-length figure entitled Arrangement in Grey and Black No.1, but usually referred to as Whistler's Mother. A model failed to appear one day, according to a letter from his mother, so Whistler turned to his mother and suggested that he do her portrait. He had her stand at first, in his typically slow and experimental way, but that proved too tiring so the seated pose was adopted. It took dozens of sittings to complete. The austere portrait in his normally constrained palette is another Whistler exercise in tonal harmony and composition. The deceptively simple design is in fact a balancing act of differing shapes, particularly the rectangles of curtain, picture on the wall, and floor which stabilize the curve of her face, dress, and chair. Whistler commented that the painting's narrative was of little importance, yet the painting was also paying homage to his pious mother. After the initial shock of her moving in with her son, she aided him considerably by stabilizing his behavior somewhat, tending to his domestic needs, and providing an aura of conservative respectability that helped win over patrons. The public reacted negatively to the painting, mostly because of its anti-Victorian simplicity during a time in England when sentimentality and flamboyant decoration were in vogue. Critics thought the painting a failed "experiment" rather than art. The Royal Academy rejected it, but then grudgingly accepted it after lobbying by Sir William Boxall—but they hung it in an