The kingdom of Pergamon had long been the mainstay of Rome's influence in the Orient. Her contact with the other protected princedoms was distant and fitful; but as long as her mandates could be issued through this faithful vassal, and he could rely on her whole-hearted support in making or meeting aggressions, the balance of power in the East was tolerably secure. It had been necessary to make Eumenes the Second see that he was wholly in the power of Rome, her vassal and not her ally. He had been rewarded and strengthened, not for his own deserts, but that he might be fitted to become the policeman of Western Asia, and it had been successfully shown that the hand which gave could also take away. The lesson was learnt by the Pergamene power, and fortunately the dynasty was too short-lived for a king to arise who should forget the crushing display of Roman power which had followed the Third Macedonian War, or for the realisation of that greater danger of a protectorate--a struggle for the throne which should lead one of the pretenders to appeal to a national sentiment and embark on a national war. Eumenes at his death had left a direct successor in the person of his son Attalus, who had been born to him by his wife Stratonice, the daughter of Ariarathes King of Cappadocia.[492] But Attalus was a mere boy at the time of his father's death, and the choice of a guardian was of vital importance for the fortunes of the monarchy. Every consideration pointed to the uncle of the heir, and in the strong hands of Attalus the Second the regency became practically a monarchy.[493] The new ruler was a man of more than middle age, of sober judgment, and deeply versed in all the mysteries of kingcraft; for a mutual trust, rare amongst royal brethren in the East, had led Eumenes to treat him more as a colleague than as a lieutenant. He had none of the insane ambition which sees in the diadem the good to which all other blessings may be fitly sacrificed, and had resisted the invitation of a Roman coterie that he should thrust his suspected brother from the throne and reign himself as the acknowledged favourite of Rome. In the case of Attalus familiarity with the suzerain power had not bred contempt. He had served with Manlius in Galatia[494] and with Paulus in Macedonia,[495] and had been sent at least five times as envoy to the capital itself.[496] The change from a private station to a throne did not alter his conviction that the best interests of his country would be served by a steady adherence to the power, whose marvellous development to be the mainspring of Eastern politics was a miracle which he had witnessed with his own eyes. He had grasped the essentials of the Roman character sufficiently to see that this was not one of the temporary waves of conquest that had so often swept over the unchangeable East and spent their strength in the very violence of their flow, nor did he commit the error of mistaking self-restraint for weakness.