The common paper paste is made of the finest flour of wheat mixed with boiling water, and some small drops of vinegar sprinkled in it: for the ordinary workman’s paste, or gum, if employed for this purpose, will render the paper brittle. Those, however, who take the greatest pains, boil the crumb of leavened bread, and then strain off the water: by the adoption of this method the paper has the fewest seams caused by the paste that lies between, and is softer than the nap of linen even. All kinds of paste that are used for this purpose, ought not to be older or newer than one day. The paper is then thinned out with a mallet, after which a new layer of paste is placed upon it; then the creases which have formed are again pressed out, and it then undergoes the same process with the mallet as before. It is thus that we have memorials preserved in the ancient handwriting of Tiberius and Caius Gracchus, which I have seen in the possession of Pomponius Secundus,[900] the poet, a very illustrious citizen, almost two hundred years since those characters were penned. As for the handwriting of Cicero, Augustus, and Virgil, we frequently see them at the present day. CHAP. 27. (13.)—THE BOOKS OF NUMA. There are some facts of considerable importance which make against the opinion expressed by M. Varro, relative to the invention of paper. Cassius Hemina, a writer of very great antiquity, has stated in the Fourth Book of his Annals, that Cneius Terentius, the scribe, while engaged in digging on his land in the Janiculum, came to a coffer, in which Numa had been buried, the former king of Rome, and that in this coffer were also found some books[901] of his. This took place in the consulship of Publius Cornelius Cethegus, the son of Lucius, and of M. Bæbius Tamphilus, the son of Quintus, the interval between whose consulship and the reign of Numa was five hundred and thirty-five years. These books were made of paper, and, a thing that is more remarkable still, is the fact that they lasted so many years buried in the ground. In order, therefore, to establish a fact of such singular importance, I shall here quote the words of Hemina himself—“Some persons expressed wonder how these books could have possibly lasted so long a time—this was the explanation that Terentius gave: ‘In nearly the middle of the coffer there lay a square stone, bound on every side with cords enveloped in wax;[902] upon this stone the books had been placed, and it was through this precaution, he thought, that they had not rotted. The books, too, were carefully covered with citrus leaves,[903] and it was through this, in his belief, that they had been protected from the attacks of worms.’ In these books were written certain doctrines relative to the Pythagorean philosophy; they were burnt by Q. Petilius, the prætor, because they treated of philosophical subjects.”[904]