This is Volume I of the third Edition of Early Tamil Epigraphy, first published in 2003. The Volume deals with Tamil-Brahmi stone inscriptions discovered up to 2012. The main feature of the edition is that it is based on fresh in situ delineation and digitisation of the cave inscriptions included in the Corpus. The work provides a detailed account of the discovery and decipherment of the inscriptions and relates their language and contents to early Tamil literature and society. Tamil-Brahmi inscriptions on pottery, coins, seals and rings, have also been utilised to present a more complete picture of early Tamil epigraphy. This work provides a detailed account of the discovery and decipherment of the inscriptions and relates their language and contents to early Tamil literature and society. Tamil-Brahmi inscriptions on pottery, coins, seals and rings, have also been utilised to present a more complete picture of early Tamil epigraphy. Two new section deal with Prakrit inscriptions on pottery and other inscribed objects, and Sinhala-Prakrit pottery inscriptions, from Tamilnadu, which bring out the interaction of Tamil-Brahmi with other contemporary languages and scripts of South India and Sri Lanka. The study deals comprehensively with the epigraphy, language and contents of the inscription. The text are given in transliteration with translation and extensive word by word commentary. The inscriptions are illustrated with direct photographs in colour, together with delineations and estampages for comparative study. Palaeography of Tamil-Brahmi is described in detail with the help of letter charts. The special orthographic and grammatical feature of the earliest Tamil inscriptions are also described. A glossary of inscriptional words and several classified word lists have been added to aid further research.