There is a great difference in the breadth of the various kinds of paper. That of best quality[894] is thirteen fingers wide, while the hieratica is two fingers less. The Fanniana is ten fingers wide, and that known as “amphitheatrica,” one less. The Saitic is of still smaller breadth, indeed it is not so wide as the mallet with which the paper is beaten; and the emporetica is particularly narrow, being not more than six fingers in breadth. In addition to the above particulars, paper is esteemed according to its fineness, its stoutness, its whiteness, and its smoothness. Claudius Cæsar effected a change in that which till then had been looked upon as being of the first quality: for the Augustan paper had been found to be so remarkably fine, as to offer no resistance to the pressure of the pen; in addition to which, as it allowed the writing upon it to run through, it was continually causing apprehensions of its being blotted and blurred by the writing on the other side; the remarkable transparency, too, of the paper was very unsightly to the eye. To obviate these inconveniences, a groundwork of paper was made with leaves of the second quality, over which was laid a woof, as it were, formed of leaves of the first. He increased the width also of paper; the width [of the common sort] being made a foot, and that of the size known as “macrocollum,”[895] a cubit; though one inconvenience was soon detected in it, for, upon a single leaf[896] being torn in the press, more pages were apt to be spoilt than before.[897] In consequence of the advantages above-mentioned, the Claudian has come to be preferred to all other kinds of paper, though the Augustan is still used for the purposes of epistolary correspondence. The Livian, which had nothing in common with that of first quality, but was entirely of a secondary rank, still holds its former place. CHAP. 25.—THE PECULIAR DEFECTS IN PAPER. The roughness and inequalities in paper are smoothed down with a tooth[898] or shell; but the writing in such places is very apt to fade. When it is thus polished the paper does not take the ink so readily, but is of a more lustrous and shining surface. The water of the Nile that has been originally employed in its manufacture, being sometimes used without due precaution, will unfit the paper for taking writing: this fault, however, may be detected by a blow with the mallet, or even by the smell,[899] when the carelessness has been extreme. These spots, too, may be detected by the eye; but the streaks that run down the middle of the leaves where they have been pasted together, though they render the paper spongy and of a soaking nature, can hardly ever be detected before the ink runs, while the pen is forming the letters; so many are the openings for fraud to be put in practice. The consequence is, that another labour has been added to the due preparation of paper. CHAP. 26.—THE PASTE USED IN THE PREPARATION OF PAPER.