Female characters appear in plays and epic poems. The 8th century poet, Bhavabhuti describes in his play, "Uttararamacharita" (verse 2 - 3), how the character, Atreyi, travelled to southern India where she studied the "Vedas" and Indian philosophy. In Madhava's "Shankaradigvijaya", Shankara debates with the female philosopher, Ubhaya Bharati and in verses 9 - 63 it is mentioned that she was well versed in the "Vedas". Tirukkoneri Dasyai, a 15th-century scholar, wrote a commentary on Nammalvar's "Tiruvaayamoli", with reference to Vedic texts such as the "Taittiriya Yajurveda".