father, and the date of issue, and have helped clarify the early history of India. Regnal dates From the reigns of Jivadaman and Rudrasimha I, the date of minting of each coin, reckoned in the Saka era, is usually written on the obverse behind the king's head in Brahmi numerals, allowing for a quite precise datation of the rule of each king. This is a rather uncommon case in Indian numismatics. Some, such as the numismat R.C Senior considered that these dates might correspond to the much earlier Azes era instead. Also the father of each king is systematically mentioned in the reverse legends, which allows reconstruction of the regnal succession. Languages Kharoshthi, a script in use in more northern territories (area of Gandhara), is employed together with the Brahmi script and the Greek script on the first coins of the Western Satraps, but is finally abandoned from the time of Chastana. From that time, only the Brahmi script would remain, together with the pseudo-Greek script on the facing, to write the Prakrit language employed by the Western satraps. Occasionally, the legends are in Sanskrit instead. The coins of Nahapana bear the Greek script legend "PANNIΩ IAHAPATAC NAHAΠANAC", transliteration of the Prakrit "Raño Kshaharatasa Nahapanasa": "In the reign of Kshaharata Nahapana". The coins of Castana also have a readable legend "PANNIΩ IATPAΠAC CIASTANCA", transliteration of the Prakrit "Raño Kshatrapasa Castana": "In the reign of the Satrap Castana". After these two rulers, the legend in Greek script becomes denaturated, and seems to lose all signification, only retaining an aesthetic value. By the 4th century, the coins of Rudrasimha II exhibit the following type of meaningless legend in corrupted Greek script: "...ΛIOΛVICIVIIIΛ...". Influences The coins of the Kshatrapas were also very influential and imitated by neighbouring or later dynasties, such as the Satavahanas, and the Guptas. Silver coins of the Gupta kings Chandragupta II and his son Kumaragupta I adopted the Western Satrap design (itself derived from the Indo-Greeks) with bust of the ruler and pseudo-Greek inscription on the obverse, and a royal eagle (Garuda, the dynastic symbol of the Guptas) replacing the chaitya hill with star and crescent on the reverse. The Western Satrap coin design was also adopted by the subsequent dynasty of the Traikutakas (388–456) or the Maitrakas (475–776). Monuments Sudarshan Lake of the Satrap period is mentioned in major rock edicts of Junagadh but no trace of it