The Valley of Lutscheuen; John Frederick Lewis; 1804-1876; British; 1827; Watercolor; white gouache; and graphite; with scratching out on medium; slightly textured; cream wove paper; Sheet: 7 3/4 x 10 1/2 inches (19.7 x 26.7 cm) and Mount: 9 3/4 x 13 5/8 inches (24.8 x 34.6 cm); geology; Grand Tour; landscape; mountains; rocks (landforms); science; trees; valley (landform); Grindelwald; Switzerland