Wooden tablets, glazed to receive coloring matter, were used by the Jews and early Egyptians, and the former wrote also with a diamond-tipped stylus on stone or metallic tables. The Greeks and Romans sometimes wired their tablets of citron-wood, beech, or fir, together at the back, so as to allow them to open like a modern book. =Calamus, or Reed.=—A great advance was made when the stylus gave way to camel’s hair brushes or reeds (_calami_) sharpened and split like our pens, and the tablets were replaced with papyrus and parchment. The reeds in common use came from Egypt, but persons of fortune often wrote with a silver calamus. The ink employed was thicker and more lasting than ours; sometimes prepared from the black fluid of the cuttle-fish, but generally from lampblack and glue, or from soot, rosin, and pitch.—Chalk pencils were at one time manufactured by the Egyptians and Greeks. With the reed and ink, bark came into use as a cheap writing material; hence the Latin word for bark, _liber_, meant also book. Leaves, too, were employed for this purpose, particularly those of the palm—whence, perhaps, the _leaf_ of a book was so called. But for manuscripts designed for permanent preservation, papyrus had the decided preference. =Papyrus=, or the _paper_-plant, the bulrush of Scripture, grew in the marshes and pools of Egypt. Its branchless stem rose from five to ten feet above the water, and was surmounted by a cluster of long, spike-shaped, drooping leaves. This plant was woven into sandals, mats, clothing, and even boats; was eaten, raw and boiled; was manufactured into furniture; and was burned for fuel and light; when prepared for writing purposes, it was invaluable. The part under the water was selected, the outer bark removed, and the delicate white layers found beneath were pressed together into sheets and dried. These were written on with red and black ink, and some of them were elaborately ornamented with many-colored figures. [Illustration: EGYPTIAN PAPYRUS.] The finest papyrus was reserved for the priests, and never exported till they had used it. But the Romans, having invented a process for removing what was first written on it, imported it in large quantities; they also attempted its cultivation in the marshes of the Tiber, but without success. The Greeks did not use it extensively until the era of the Ptolemies. =Parchment= was prepared from the skins of sheep and goats by polishing them with pumice-stone and then rubbing in fragrant oil. Its name, in Latin _pergamena_, would seem to indicate Pergamus in western Asia as the place of its origin; but centuries before that little kingdom became celebrated for its library of parchment volumes, this material, or something very like it, was known. Herodotus mentions its use in his time; and the Jews, as a pastoral people familiar with the art of dressing skins, wrote their first books on a kind of leather. [Illustration: READING A VOLUMEN, OR ROLL.]