Caesar says the same of the Druids.

Even Panini never alludes to written words or letters.

None of the ordinary modern words for book, paper, ink, or writing have been found in any ancient Sanskrit work.

No such words as _volumen_, volume; _liber_, or inner bark of a tree; _byblos_, inner bark of papyrus; or book, that is beech wood.

But Buddha had learnt to write, as we find by a book translated into Chinese A.D.76.