The origins of Tamil, like the other Dravidian languages are unknown, but unlike most of the other established literary languages of India, are independent of Sanskrit. Tamil has the oldest literature amongst the Dravidian languages (Hart, 1975), but dating the language and the literature precisely is difficult. Literary works in India or Sri Lanka were preserved either in palm leaf manuscripts (implying repeated copying and recopying) or through oral transmission, making direct dating impossible. External chronological records and internal linguistic evidence, however, indicate that the oldest extant works were probably composed sometime in the 2nd century CE.