If the custom which subsequently prevailed in the Persian kingdom was current among the Medes, and the sons of the satraps or princes of the subject lands had to wait at the king's gate, and perform courtly or martial service as hostages for the fidelity of their fathers, and at the same time to learn obedience and submission in order to find favour with the king when in his immediate presence and covered by the splendour of his power--Cyrus must also have served at the court of Astyages, and may have filled the office of the staff-bearer, body-guard, or of butler, an honourable position at the court of the Medes and Persians. In Ecbatana he had no doubt an opportunity of comparing the simple manners, the capacity and vigour of his Persians, with the splendour of the court, and the luxurious life of the Median chiefs. Moreover, the great advantage which Spitamas had gained by marriage with the daughter of the king must have excited the jealousy and ambition of other Medes who considered themselves to have a better claim, or even raised their eyes to the throne. In the account of Herodotus, Harpagus is said to be akin to the family of Astyages. It is possible that Cyrus contemplated a breach between Persia and Media on the death of Astyages, when he would find his opportunity in a contested and previously disputed succession. It may be a fact that Astyages had his suspicions, that he summoned Cyrus who had already left the court before him, and Cyrus was thus compelled to break with him sooner than he intended. It seems more certain that Cambyses was still alive, than that the Persians took up arms against Astyages at the instigation of Cyrus, who was, as we have remarked, at that time in his fortieth year.[556]