Pissaro

Hot on the heels of last month’s record-setting auction of Claude Monet’s 1891 Meules, Sotheby’s is hoping for another big sale with his 1908 Nymphéas. Estimated to sell for $31.…

BOSTON—The fragility of powdery pigment and the light sensitivity of the paper on which it rests mean pastels can rarely be exhibited—typically for only a few months per decade. …