Goddess Saraswati graphic dated 132 AD excavated from Kankali tila depicts her Keeping a manuscript in her left hand represented being a certain and tied palm leaf or birch bark manuscript. In India a bounded manuscript made of birch bark or palm leaf existed side by side considering that antiquity. https://davidhoffmeister.com/david-hoffmeister-the-message/metaphysics-of-a-course-in-miracles/