Two doors, at the right and the left of the tablinum (seen in Fig. 143), opened into large dining rooms, one (E) nearly square, the other (F) oblong. Both had large windows on the side of the peristyle, and the one at the left also a door opening upon the colonnade. The mosaic pictures in the floors harmonized well with the purpose of the rooms. In one were fishes of various kinds, and sea monsters; in the other was the picture--often reproduced--in which the Genius of the autumn is represented as a vine-crowned boy sitting on a panther and drinking out of a deep golden bowl. The colonnade of the first peristyle was of one story (Fig. 141). The entablature of the well proportioned Ionic columns presented a mixture of styles often met with in Pompeii, a Doric frieze with a dentil cornice. The wall surfaces were divided by pilasters and decorated in the first style. In the middle of the garden the delicately carved standard of a marble fountain basin may still be seen. The open front of the broad exedra (H) was adorned with two columns, and at the rear was a window extending almost from side to side, opening upon the second peristyle. Between the columns of the entrance were mosaic pictures of the creatures of the Nile,--hippopotamus, crocodile, ichneumon, and ibis; and in the room, filling almost the entire floor, was the most famous of ancient mosaic pictures, the battle between Alexander and Darius. This great composition has so often been reproduced that we need not present it here; as illustrating the style and treatment, however, we give a small section, in which the face of Alexander appears (Fig. 142). The mosaic is a reproduction of a painting made either in the lifetime of Alexander, or soon after his death. The battle is perhaps that of Issus. The left side of the picture is unfortunately only in part preserved. At the head of the Greek horsemen rides Alexander, fearless, unhelmeted, leading a charge against the picked guard of Darius. The long spear of the terrible Macedonian is piercing the side of a Persian noble, whose horse sinks under him. The driver of Darius's chariot is putting the lash to the horses, but the fleeing king turns with an expression of anguish and terror to witness the death of his courtier, the mounted noblemen about him being panic-stricken at the resistless onset of the Greeks. The grouping of the combatants, the characterization of the individual figures, the skill with which the expressions upon the faces are rendered, and the delicacy of coloring give this picture a high rank among ancient works of art. The colors in the mosaic are necessarily more subdued than in the original painting. [Illustration: Fig. 142.--Detail from the mosaic picture representing a battle between Alexander and Darius. Alexander, having thrown aside his helmet, is leading the charge upon the guard of Darius, who is already in flight.]