Japanese cotton yarns are imported to be woven into a strong cloth on Korean hand-looms. Beans and peas, rice, cowhides, and ginseng are the chief exports, apart from gold.
According to the Arab historian, Tabari, these were written on 12,000 cowhides, a statement confirmed by Masudi, who writes: Zartusht gave to the Persians the book called Avesta.
This book, in the writing which Zartusht invented and which the Magi called the writing of religion, was written on 12,000 cowhides, bound together by golden bands.
According to the Arda-Viraf--Nama the religion revealed through Zoroaster has subsisted in its purity for 300 years, when Iskander Rumi (Alexander the Great) invaded and devastated Iran, and burned the Avesta which, written on cowhides with golden ink, was preserved in the archives at Persepolis.