We are not confined in our investigations of ancient MSS. to any particular locality or date, as the twelfth, thirteenth, fourteenth and fifteenth centuries are prolific of "gall" ink monuments covering an immense territory. Such inks when used unadulterated, remain in an almost pristine color condition; while the other inks to which some pigment or color had been added, probably to make them more agreeable in appearance and more free-flowing, with a mistaken idea of improving them, are much discolored and in every instance present but slight indications of their original condition. The question of the character of the paper employed during these eras, composed of different kinds of fibrous vegetable substances, possesses some importance when discussing its relationship to inks. Many authors certify to the manufacture and use of "cotton" in the eleventh, twelfth and later centuries. Madan, however, in treating this subject, makes the following comments which are in line with my own observations: "Paper has for long been the common substance for miscellaneous purposes of ordinary writing, and has at all times been formed exclusively from rags (chiefly of linen) reduced to pull), poured out on a frame in a thin watery sheet, and gradually dried and given consistence by the action of heat. It has been a popular belief, found in every book till 1886 (now entirely disproved, but probably destined to die hard), that the common yellowish thick paper, with rough fibrous edge, found especially in Greek MSS. till the fifteenth century, was paper of quite another sort, and made of cotton (charta bombycna, bombyx being usually silk, but also used of any fine fibre such as cotton). The microscope has at last conclusively shown that these two papers are simply two different kinds of ordinary linen-rag paper." De Vinne speaking, of paper and paper-making says: