Landscape; Castle by a River; William Green; 1760-1823; British; undated; Watercolor; with pen in gray ink; over graphite on moderately thick; moderately textured; cream; wove paper; Sheet: 15 3/4 x 22 1/16 inches (40 x 56 cm); Contemporary drawn border: 15 3/16 x 21 1/2 inches (38.6 x 54.6 cm); and Image: 14 7/8 x 21 1/4 inches (37.8 x 54 cm); architectural subject; castle; landscape; river; sky