The Roman History: Macedonian Affairs (XII-XV)

After his victory Perseus, either to make sport of Crassus, and by way of joke, or to test his present state of mind, or fearing the power and resources of the Romans, or for some other reason, sent messengers to him to treat for peace, and promised to make many concessions which his father, Philip, had refused. In this promise he seemed to be rather joking with him and testing him. But Crassus replied that it would not be worthy of the dignity of the Roman people to come to terms with him unless he should surrender Macedonia and himself to them. Being ashamed that the Romans were the first to retreat, Crassus called an assembly, in which he praised the Thessalians for their brave conduct in the catastrophe, and falsely accused the Aetolians and the other Greeks of being the first to fly; and these men he sent to Rome.

Both armies employed the rest of the summer in collecting corn, Perseus threshing in the fields and the Romans in their camp.

He (Q. Marcius) was foremost in labor, although sixty years of age and very corpulent.

Then somebody ran to Perseus, while he was refreshing himself with a bath, and told him [that the enemy was approaching]. He sprang out of the water, exclaiming that he had been captured before the battle.