Across the Continent: "Westward the Course of Empire Takes its Way". Dated: 1868. Dimensions: image: 44.5 x 69 cm (17 1/2 x 27 3/16 in.) sheet: 52.5 x 74.5 cm (20 11/16 x 29 5/16 in.). Medium: hand-colored lithograph, with touches of gum arabic, on w