A 2nd century gold plate carrying a Sinhala Prakrit inscription was found under the foundation of the Vishnu Hindu temple at Vallipuram. It mentions about the establishment of a Vihara in Nakadiva by the minister named Isigiraya under the ruler King Vasaha who is identified as King Vasabha (67-111 C.E.). The inscription is important as it confirms that King Vasabha was ruling the whole country including Nakadiva (Nakadiva in Old Sinhala is the equivalent of Pali Nagadipa, whilst the use of the phoneme 'k' to represent 'g' reveals Dravidian influence). The language and interpretation of the inscription is disputed. According to Senarath Paranavithana, this is an inscription written in Old Sinhalese. Peter Schalk believes that this inscription is in Prakrit bearing Dravidian influences and the name Nakadiva is a fiefdom corresponding to modern Jaffna Peninsula, which was ruled under the minister Isikiraya.