The Four Elements, heroic pieces by Robert I. Aitken, are placed at the top of the main stairways leading down into the sunken gardens of the Court of the Universe. In spite of their imaginative themes, these massive works have the same gripping reality that characterizes all the later method of this sculptor. He has treated the elements, especially "Earth" and "Air," in their relation to man. As here pictured, "Earth," the quiet mother, sleeps on her rocks, over which little human beings struggle and toil. The rear view of "Air," the group on the opposite side of the same stairway, may be seen in the foreground of the plate illustrating The Nations of the East. "Air" holds a star in her hair; she has great wings and is attended by floating sea-gulls. Behind her, a man has strapped his arms to her mighty pinions, signifying the effort of the present age to ride the winds. "Fire" and "Water," across the gardens, are shown in vivid action; "Fire" roaring with his salamander, and "Water" blowing a stormy gust across the waves. The Signs of the Zodiac Frieze on the Corner Pavilions Low relief, the form that is so difficult and so beautiful and satisfying when perfectly achieved, is at its finest in the sculptured mural panels that crown the corner pavilions of the Court of the Universe and the Forecourt of the Stars. These are the panels of "The Signs of the Zodiac," by Hermon A. MacNeil, who is better known to Exposition visitors by his finial group, "The Adventurous Bowman," on the Column of Progress. The idea of the overhanging, serene heavens, expressed by the Star Colonnade, is extended by these panels. About the central figure of Atlas or Time, his heavenly daughters move, bearing the Zodiacal symbols, to indicate the sweep of the constellations and the onward march of time. This impression of the steady, slow passage of our days is increased by the gentle motion of the figures, so slight as to be felt rather than seen. The frieze has a clean-cut effect almost cameo-like in its precision and the harmony and grace of the whole composition have frequently been found suggestive of the decorations on an Attic urn. Nations of the West Group, Arch of the Setting Sun