Some time later, being incensed against Attalus, king B.C. 154 of the Asiatic country about Pergamus, Prusias ravaged his territory. When the Roman Senate learned of this they sent word to Prusias that he must not attack Attalus, who was their friend and ally. As he was slow in obeying, the ambassadors laid stern commands upon him to obey the orders of the Senate and to go with 1000 horse to the boundary line to negotiate a treaty with Attalus, who, they said, was awaiting him there with an equal number. Despising the handful of men with Attalus and hoping to ensnare him, Prusias sent the ambassadors in advance to say that he was following with 1000 men, but actually put his whole army in motion and advanced as if to battle. When Attalus and the ambassadors learned of this they took to promiscuous flight. Prusias seized the beasts of burden belonging to the Romans that had been left behind, captured and destroyed the stronghold of Nicephorium, burned the temples in it, and besieged Attalus, who had fled to Pergamus. When these things became known in Rome a fresh embassy was sent, ordering Prusias to make compensation to Attalus for the damage done to him. Then Prusias became alarmed, obeyed the order, and retired. The ambassadors decided that as a penalty he must transfer to Attalus twenty decked ships at once, and pay him 500 talents of silver within a certain time. Accordingly he gave up the ships and began to make the payments at the prescribed time.
						 As Prusias was hated by his subjects on account of his extreme cruelty they became greatly attached to his son, Nicomedes. Thus the latter fell under the suspicion of Prusias, who sent him to live in Rome. Learning that he Y.R. 606 was much esteemed there also, Prusias directed him to B.C. 148 petition the Senate to release him from the payment of the money still due to Attalus. He sent Menas as his fellow-ambassador, and told him if he should secure a remission of the payments to spare Nicomedes, but if not, to kill him at Rome. For this purpose he sent a number of small boats with him and 2000 soldiers. As the fine imposed on Prusias was not remitted (for Andronicus, who had been sent by Attalus to argue on the other side, showed that it was less in amount than the plunder), Menas, seeing that Nicomedes was an estimable and attractive young man, was at a loss to know what to do. He did not dare to kill him, nor to go back himself to Bithynia. The young man noticed his delay and sought a conference with him, which was just what he wanted. They formed a plot against Prusias and secured the coöperation of Andronicus, the legate of Attalus, that he should persuade Attalus to take back Nicomedes to Bithynia. They met by agreement at Bernice, a small town in Epirus, where they entered into a ship by night to confer as to what should be done, and separated before daylight.