The first text in Greek devoted entirely to India was written by Ctesias in the fourth century BCE. Only fragments of it survive. Yet he was probably the most widely quoted author on India, although Aristotle treated him with contempt. However, soon after Aristotle drew upon Ctesias' writings, as did Plato, Xenophon and Plutarch. From all these account India became a happy land, a kind of utopia. Pliny (24-79 CE) put forth the age-old notion that India covered one-third of the surface of the earth. Indian kings from Father Tiber to Alexander had reigned 6451 years and three months.
This is a companion discussion topic for the original content at https://www.worldhistory.org/article/198/ancient-geography-of-india/.