Alfred Sisley (1839-1899): Fog, Voisins, 1874 (Oil on canvas, Musée d'Orsay, Paris, France) - Sisley, along with Monet, was one of the central proponents of the plein air technique, using this method in his famous paintings of the Voisins countryside, where he moved in 1871. Unlike Degas, Renoir,…