The first example of a palm leaf Sanskrit MS. belongs to the sixth century A.D. It is preserved in Japan, but there is a facsimile of it in the Bodleian Library. According to the Chinese pilgrim Hiouen Thsang, the use of the palm leaf was common all over India in the seventh century; but that it was known many centuries earlier is proved by the fact that an inscribed copper-plate, dating from the first century A.D. at the latest, imitates a palm leaf in shape. Paper was introduced by the Muhammadan conquest, and has been very extensively used since that time for the writing of MSS. The oldest known example of a paper Sanskrit MS. written in India is one from Gujarat, belonging to the early part of the thirteenth century. In Northern India, where ink was employed for writing, palm leaves went out of use after the introduction of paper. But in the South, where a stilus has always been employed for scratching in the character, palm leaves are still common for writing both MSS. and letters. The birch bark and palm leaf MSS. are held together by a cord drawn through a single hole in the middle, or through two placed some distance apart. This explains how the Sanskrit word for "knot," grantha, came to acquire the sense of "book." Leather or parchment has never been utilised in India for MSS., owing to the ritual impurity of animal materials. For inscriptions copper-plates were early and frequently employed. They regularly imitate the shape of either palm leaves or strips of birch bark. The actual use of ink (the oldest Indian name of which is mashi) is proved for the second century B.C. by an inscription from a Buddhist relic mound, and is rendered very probable for the fourth century B.C. by the statements of Nearchos and Quintus Curtius. All the old palm leaf, birch bark, and paper Sanskrit MSS. have been written with ink and a reed pen, usually called kalama (a term borrowed from the Greek kalamos). In Southern India, on the other hand, it has always been the practice to scratch the writing on palm leaves with a stilus, the characters being subsequently blackened by soot or charcoal being rubbed into them. Sanskrit MSS. of every kind are usually kept between thin strips of wood with cords wound round them, and wrapped up in coloured, sometimes embroidered, cloths. They have been, and still are, preserved in the libraries of temples, monasteries, colleges, the courts of princes, as well as private houses. A famous library was owned by King Bhoja of Dhar in the eleventh century. That considerable private libraries existed in fairly early times is shown by the fact that the Sanskrit author Bana (about 620 A.D.) had in his employment a reader of manuscripts. Even at the present day there are many excellent libraries of Sanskrit MSS. in the possession of Brahmans all over India.