Dr. Sachs, in his lecture last night treated of those vases which relate to the later books of the Iliad. The episode of the death of Sarpedon shows how the ancient conception differed from the mediaeval. Death among the Greeks was the twin brother of Sleep, and both were represented by the same art type of perfect repose. This idea was far more comforting to men than the skeleton of Christian art. In the vase-paintings, Death and Sleep together bear away the body with infinite tenderness, while the attitude of the deceased shows trust and resignation. On the earlier vases the two are represented as conquerors of mankind, and are therefore clothed as warriors, but this type soon yields to a more beautiful one. The Greek craftsman was fully aware of the limitations of his art, and never tried to represent such difficult themes as the shield of Achilles. His skill was, however, shown in the way in which he overcame the inherent clumsiness of the sea monster which usually accompanied Thetis. In the later vases the artist tried to give the effect of a foreground and background by the use of foreshortening; but, owing to the fact that he was confined to a single color, the attempt was not successful. The capture of Troy, as described by the non-Homeric epics, was a favorite subject, and was treated in a great variety of ways by a long line of artists.