on one side Greek inscriptions, which are repeated in other characters on the reverse. To the inscriptions of king Açoka at Kapur-i-Giri, and to these coins, together with those of the Græco-Indian kings, and some later coins belonging to the Arsacids and the Indo-Scythian princes, we owe the information that the east of Iran possessed a peculiar alphabet and mode of writing, while the Medes and Persians of the west borrowed their earliest letters from the Assyrio-Babylonian cuneiform writing, and afterwards, from about the fourth century B.C., adopted the cursive character of the Aramæans. Although, as we may conclude from these indications, the Greek sovereigns of Bactria resolved to pay a certain respect to the civilisation of their subjects, their kingdom was short-lived. The nations of the steppes of the Oxus, themselves under pressure, began to advance to the south (after 160 B.C.); in the west the Parthians rose into power. Mithridates I. of Parthia incorporated Bactria in his kingdom about 140 B.C., and Bactria subsequently became a part of the Parthian empire. Heliocles, the son of Eucratides, was thus limited to the land of the Cabul and Indus, but on the borders of India the power and influence of the Greeks remained unbroken. Greek captains--Menander, and after him Apollodotus, who had previously no doubt been subject to the Bactrians--issued from the southern slope of the Hindu Kush in the last decades of the second century B.C., and conquered the land of the Indus as far as the mouth of the river, and the Panjab. They advanced to the Yamuna, and reduced Surashtra (Guzerat) and Cashmere to dependence. Even at the end of the first century B.C. coins of these princes were current on the coast of Surashtra, and they are still found on the banks of the Yamuna.[43]