 Similarly, the Sanskrit plays "Anargharāghava" and Rajasekhara's "Bālarāmāyaṇa" of the ninth century refer to a shrine of Agastya on or near Adam's Peak (Sri Pada), the tallest mountain in Sri Lanka (ancient Tamraparni), from whence the river Gona Nadi/Kala Oya flows into the Gulf of Mannar's Puttalam Lagoon.Maharishi Agastya is regarded as the founder and patron saint of silambam and varmam -an ancient science of healing using varmam points for varied diseases and southern kalaripayat.Shiva's son Murugan is said to have taught the art to Sage Agastya who then wrote treatises on it and passed it on to other siddhar.