Ἰνδικά 7.1: Strabo II, p. 76

7.1

Eratosthenes perstringit Daimachum, qui oblocutus erat Μεγασθένει φήσαντι ἐν τοῖς νοτίοις μέρεσι τῆς Ἰνδικῆς τάς τε ἄρκτους ἀποκρύπτεσθαι καὶ τὰς σκιὰς ἀντιπίπτειν.

Hipparchos controverts this view, urging the futility of the proofs on which it rests. Patrokles, he says, is unworthy of trust, opposed as he is by two competent authorities, Deimachos and Megasthenes, who state that in some places the distance from the southern sea is 20,000 stadia, and in others 30,000. Such, he says, is the account they give, and it agrees with the ancient charts of the country.