The most famous of his works was the picture of Ialysus and his Dog, which occupied him seven years. The dog, represented as panting and foaming at the mouth, was greatly admired; and it is related that Protogenes was for a long time unable to represent the foam in the manner he wished, till at length he threw his sponge in a fury at the mouth, and produced the very effect he desired! The fame of this painting was so great, that, according to Pliny, Demetrius Poliorcetes, when besieging Rhodes, did not assault that part of the city where Protogenes lived, lest he should destroy the picture. His studio was situated without the walls, where, to the astonishment of the besiegers, he continued to paint with perfect tranquillity. This coming to the ears of Demetrius, he ordered the artist to be brought to his tent, and demanded how he could persist in the quiet exercise of his profession, when surrounded by enemies? Protogenes replied that he did not consider himself in any danger, convinced that a great prince like Demetrius did not make war against the Arts, but against the Rhodians. PARRHASIUS. This great painter was a native of Ephesus, but became a citizen of Athens, where he flourished about B. C. 390. He raised the art to a much higher degree of perfection than it had before attained. Comparing his three great predecessors with each other, he rejected their errors, and adopted their excellencies. The classic invention of Polygnotus, the magic tones of Apollodorus, and the exquisite design of Zeuxis, are said to have been united in the works of Parrhasius. He reduced to theory the practice of former artists, and all cotemporary and subsequent painters adopted his standard of heroic and divine proportions; hence he was called the _Legislator of Painting_. THE DEMOS AND OTHER WORKS OF PARRHASIUS.