This acquiescence in their wishes on the part of the Great King, and his abstinence from any attempt at compulsion, would seem to have paved the way for that thoroughly good understanding between the suzerain power and her dependency which characterises the relations of the two for the next century and a half, with the single exception of one short interval. “The navy of Phoenicia became a regular and very important part of the public power”[14265] of the Persian state. Complete confidence was felt by their Persian masters in the fidelity, attachment, and hearty good-will of the Phoenician people. Exceptional favour was shown them. Not only were they allowed to maintain their native kings, their municipal administration, their national laws and religion, but they were granted exceptional honours and exceptional privileges and immunities. The Great King maintained a park and royal residence in some portion of Phoenicia,[14266] probably in the vicinity of Sidon,[14267] and no doubt allowed his faithful subjects to bask occasionally in the sunshine of his presence. When the internal organisation of the empire was taken in hand, and something approaching to a uniform system of government established for revenue purposes, though Phoenicia could not be excused from contributing to the taxation of the empire, yet the burden laid upon her seems to have been exceptionally light. United in a satrapy--the fifth--with Syria, Cyprus, and Palestine, and taxed according to her population rather than according to her wealth, she paid a share--probably not more than a third or a fourth--of 350 talents,[14268] or an annual contribution to the needs of the empire amounting to no less than 30,000l. Persia, moreover, encouraged Phoenicia to establish an internal organisation of her own, and, under her suzerainty, Tyre, Sidon, and Aradus were united by federal bonds, and had a common council, which met at Tripolis, probably of three hundred members.[14269] This council debated matters in which Phoenicia generally was interested, and, in times of disturbance, decided questions of peace and war. The reign of Darius Hystaspis (B.C. 521-486), the successor of Cambyses upon the Persian throne, introduced several changes into the Persian governmental system which were of advantage to the Phoenicians. Darius united the most distant parts of his empire by postal routes, along which at moderate intervals were maintained post-houses, with relays of horses,[14270] primarily for the use of the government, but at the service of the traveller or private trader when not needed for business of state. Phoenician commerce must have been much helped by these arrangements, which facilitated rapid communication, gave security to lines of route which had been previously infested with robbers, and provided resting-places for the companies of merchants and traders, not unlike the caravanserai of modern Turkey and Persia.