Antigonus was not alarmed at his amours, his extravagancies, or his carousals, for he knew that, although in time of peace Demetrius used to indulge unrestrainedly in these pleasures, yet that in war he was as sober as though it were natural to him to be so. It is said that, in allusion to the empire which Lamia had now gained over Demetrius, once when he affectionately embraced his father on his return from a journey, Antigonus said, "My boy, you seem to think that you are caressing Lamia." Another time, when Demetrius spent several days in drinking, and excused himself by saying that he had been laid up with a severe cold, Antigonus answered, "So I understood, but was the cold Chian or Thasian?" Once Antigonus heard that Demetrius had a fever, and went to see him. At the door he met one of his favourites coming out. He went in, sat down by his bedside, and took him by the hand. When Demetrius said that the fever had just left him, Antigonus answered, "Yes, I met it just now at the door." So gently did he deal with the vices of Demetrius, because of his many other good qualities. The Scythians have a custom of twanging their bows while they are drinking and carousing, as though to recall their courage while it is melting away in pleasure; but Demetrius used to give up his whole thoughts at one time to pleasure, and at another to serious work, concentrating his entire attention upon the matter in hand, so that his amusements never interfered with his preparations for war. XX. He appears indeed to have been better able to make preparations for war than to use them, for he always liked to be more than sufficiently provided with stores of every kind, and always wished to construct larger ships, and more powerful battering engines, in the working of which he took an especial delight. He was intelligent and clever, and did not waste his mechanical ingenuity in mere pastime, like other princes, who have amused themselves by playing on the flute, painting, or working in metal. Æropus, king of Macedonia, used to employ his leisure time in making little tables and lamps; while Attalus, surnamed Philometor, amused himself by cultivating poisonous herbs, not merely hyoscyamus and hellebore, but even hemlock, aconite and dorycnium.[298] These he used to plant and tend with his own hands in the royal gardens, and made it his business to know their various juices and fruit, and to gather it in due season. The kings of Parthia, too, used to pride themselves upon sharpening the points of their own javelins. But the mechanics of Demetrius were always upon a royal scale, and his engines were of enormous size, showing by their admirable and ingenious construction the grand ideas of their inventor; for they appeared worthy not only of the genius and wealth, but of the hand of a king. Their size astonished his friends, while their beauty charmed even his enemies, and this praise is far from being as exaggerated as it sounds; for his