While Priam was still conversing with Helen, a herald entered with the startling news that his presence was required in the field, to settle the conditions of the single combat between Paris and Menelaus. Some natural pangs he felt, when he heard of the danger which threatened his son. Nevertheless he set out at once, taking with him the victims required for the sacrifice. When he came to the open space between the two armies he found all things ready for the solemn rite. The chiefs stood waiting in a circle, and in their midst was Agamemnon, who acted as priest. The heralds mingled two portions of pure[3] wine in a bowl, and poured water over the hands of the chieftains. Then Agamemnon drew a sharp knife, which hung at his girdle by his ponderous sword, and cutting off a few hairs from the foreheads of the victims gave them to the heralds to distribute among the princes. When this was done, amidst a general hush he uttered this solemn prayer: "Father Zeus, Lord of Ida, most glorious, most mighty, ye rivers, and thou earth, and ye dread powers beneath, who take vengeance after death on all those who swear a false oath, be ye all the witnesses and guardians of our treaty. If Paris slays Menelaus he shall keep Helen for his wife, with all her goods; but should Paris fall Helen shall go back to Menelaus, her lawful lord. Let the war be decided by the issue of this combat, and Heaven defend the right!" Therewith he cut the throats of the victims, and laid their quivering bodies on the ground. Then the drink-offering was poured, with this awful imprecation on those who should break the treaty: "If any man violate our sworn oath, may his brains be poured out, even as this wine, and may his wife and children be sold into bondage." [3] In sacrifices pure wine was used; wine for drinking was always mixed with water. Priam now took his departure from the field, for he could not bear to see his son in deadly combat with Menelaus. When he was gone, Hector and Odysseus measured out the ground for the duel, and shook the lots in a helmet, to see who should be the first to cast his spear; and the lot fell on Paris. Meanwhile Paris was putting on his armour; for he had come lightly equipped as an archer into the field.