Camille Pissarro (1830-1903) was not only a central figure in the Impressionist movement but a major influence on the development of modern art. He was the only artist to exhibit at all eight of the Impressionist exhibitions between 1874 and 1886, and his letters are a fascinating and invaluable source of information on the theoretical aspects and practical implications of Impressionism. Pissarro's career touched that of an extraordinary number of his contemporaries, to whom he was often a teacher and always a friend. In his early years he worked with Monet; in the 1870s he painted in close friendship with Cezanne; he was a guide for Gauguin, whom he introduced to the Impressionist group; and in the 1880s he flirted with Neo-Impressionism with Seurat.