Ancient India as described by Megasthenês and Arrian/Frag. XXII.
Fragm. XXII.
Boissonade, Anecd. Græc. I. p. 419.
Of the River Silas.
There is in India a river called the Silas, named after the fountain from which it flows, on which nothing will float that is thrown into it, but everything sinks to the bottom, contrary to the usual law.