Philip Lake, Albert Houtum-Schindler, Eduard Meyer, Karl F. Geldner and Karl H. Ethé, 1911 Encyclopædia Britannica (1911)
“ The district of Persis, also, became independent soon after the time of Antiochus IV., and was ruled by its own kings, who perpetuated the Achaemenian traditions, and on their coins—which bear the Persian language in Aramaic characters, i.e. the so-called Pahlavi—appear as zealous adherents of Zoroastrianism and the Fire-cult (see Persis) . They were forced, however, to acknowledge the suzerainty of Parthia, to which they stood in the same position as the Persians of Cyrus and his forefathers to the Median Empire (cf. Strabo xv. 728, 733, 736; Lucian, Macrob. 15) . ”
