Since the earliest available Kannada work is one on grammar and a guide of sorts to unify existing variants of Kannada grammar and literary styles, it can be safely assumed that literature in Kannada must have started several centuries earlier. An early extant prose work, the Vaḍḍārādhane (ವಡ್ಡಾರಾಧನೆ) by Shivakotiacharya of 900 AD provides an elaborate description of the life of Bhadrabahu of Shravanabelagola. Some of the early writers of prose and verse mentioned in the Kavirajamarga, numbering 8–10, stating these are but a few of many, but whose works are lost, are Vimala or Vimalachandra (c. 777), Udaya, Nagarjuna, Jayabandhu, Durvinita (6th century), and poets including Kaviswara, Srivijaya, Pandita, Chandra, Ravi Kirti (c. 634) and Lokapala. For fragmentary information on these writers, we can refer the work Karnataka Kavi Charite. Ancient indigenous Kannada literary compositions of (folk) poetry like the Chattana and Bedande which preferred to use the Desi metre are said to have survived at least until the date of the Kavirajamarga in 850 AD and had their roots in the early Kannada folk literature. These Kannada verse-compositions might have been representative of folk songs containing influence of Sanskrit and Prakrit metrical patterns to some extent. "Kavirajamarga" also discusses earlier composition forms peculiar to Kannada, the "gadyakatha", a mixture of prose and poetry, the "chattana" and the "bedande", poems of several stanzas that were meant to be sung with the optional use of a musical instrument. Amoghavarsha Nripatunga compares the puratana-kavigal (old Kannada poets) who wrote the great Chattana poems in Kannada to the likes of the great Sanskrit poets like Gunasuri, Narayana, Bharavi, Kalidasa, Magha, etc. This Old Kannada work, Kavirajamarga, itself in turn refers to a Palagannada (Old Kannada) of much ancient times, which is nothing but the Pre-Old Kannada and also warns aspiring Kannada writers to avoid its archaisms, as per R. S. Hukkerikar. Regarding earlier poems in Kannada, the author of "Kavirajamarga" states that old Kannada is appropriate in ancient poems but insipid in contemporaneous works as per R. Narasimhacharya. Gunanandi (900 AD), quoted by the grammarian Bhattakalanka and always addressed as Bhagawan (the adorable), was the author of a logic, grammar and sahitya. Durvinita (529–579 AD), the Ganga king, was the pupil of the author of Sabdavatara, i.e., Devanandi Pujyapada. Durvinita is said to have written a commentary on the difficult 15th sarga of Bharavi's Kiratarjuniya in Kannada. Early Kannada writers regularly mention