On the Arch of the Setting Sun, the prairie schooner is the center of the group of the Nations of the West, on the top a figure of Enterprise, the Spirit of the West. (p. 59.) On either side of her is a boy. These are the Heroes of Tomorrow. Between the oxen rides the Mother of Tomorrow. Beside the ox at the right is the Italian immigrant, behind him the Anglo-American, then the squaw with her papoose, and the horse Indian of the plains. By the ox at the left is the Teuton pioneer, behind him the Spanish conquistador, next, the woods Indian of Alaska, and lastly the French Canadian. Three sculptors collaborated in the modeling of these groups, A. Stirling Calder, Leo Lentelli, and Frederick G. R. Roth. Of the Mural Paintings under the Arches of the Nations, the two by Edward Simmons in the arch on the east are an allegory of the movement of the peoples across the Atlantic, while those by Frank Vincent Du Mond in the western arch picture in realistic figures the westward march of civilization to the Pacific. Historically, the picture on the southern wall of the Arch of the Nations of the East comes first. Here Simmons has represented the westward movement from the Old World through natural emigration war, conquest, commerce and religion, personifying these in types of the people who have crossed the Atlantic. On the strand, beyond which appear types of the navies of the ages, are the following: an inhabitant of the fabled Atlantis, here conceived as a savage; the Greek warrior, perhaps one of those who fared with Ulysses over the sea to the west; the adventurer and explorer, portrayed as Columbus; the colonist, Sir Walter Raleigh; the missionary, in garb of a priest; the artist, and the artisan. All are called onward by the trumpet of the Spirit of Adventure, to found new families and new nations, symbolized by the vision of heraldic shields. Behind them stands a veiled figure, the Future listening to the Past. The long period in which this movement has been in progress is expressed by the dress of the travellers. This might be called the Material Movement to the West, for the picture opposite depicts the Ideals of that progress. Hope leads the way, though some of the Hopes, shown as bubbles, were but Illusions. Then follow Adventure, Art, Imagination, Truth, Religion, and the spirits of domestic life. Simmons' work is characterized by grace and delicacy. The pictures are pleasing as form and color alone, but without titles the allegories are too difficult for people unaccustomed to interpreting this kind of art.