The writer however consulted a clever leather worker and gave him a skin measuring about 3 feet by 2, suggesting certain ways of cutting it. He produced eventually, by wetting, pulling and pinning, a beautiful roll of nearly 4 inches in breadth and 16 feet 9 inches in length.

Mediæval leather workers were no doubt more skilled and practised in this particular art than anyone now is, and the experiment showed that there is really nothing out of the way in the very long rolls which at first sight seem so surprising.

Rolls were written upon in three ways. In the oldest rolls the usual way was to write lines across the breadth of the roll, which was held upright before the reader, and unrolled from the top downwards.

Fig. 17.—Roll written upon across its shorter diameter.

A rare form of writing upon rolls is that found in the prayers written on the strips which are rolled up inside Buddhist prayer wheels. Such prayers, however, are never read, but are counted as being read through on each revolution of the wheel. Each line of manuscript runs along the entire length of the roll, which is unrolled sideways. The prayer wheels vary immensely in size, the best known being the little hand ones chiefly used in Thibet; they are variously ornamented.

Fig. 18.—Roll written upon longitudinally.

The form of writing in rolls that is of most interest so far as books is concerned is a modification of the Thibetan form. Instead of each line running the whole length of the roll, a space limit is now fixed, and the lines of writing follow under each other, so that the page form is at once apparent. This form, a late one, can be seen in the case of the Jewish scrolls of the law. The roll is unrolled sideways, and the rollers at each end are often very handsomely decorated.