The forerunner of modern European paper was probably that which the Chinese made from silk as early as the second century before Christ. For silk the Mohammedans at Mecca and Damascus in the middle of the eighth century appear to have substituted cotton, and this so-called Damascus paper was later imported into Greece and southern Italy and into Spain. In the latter country the native-grown hemp and flax were again substituted for cotton, and the resulting linen paper was used considerably in Castile in the thirteenth century and thence penetrated across the Pyrenees into France and gradually all over western and central Europe. Parchment, however, for a long time kept its preeminence over silk, cotton, or linen paper, because of its greater firmness and durability, and notaries were long forbidden to use any other substance in their official writings. Not until the second half of the fifteenth century was assured the triumph of modern paper, [Footnote: The word "paper" is derived from the ancient "papyrus."] as distinct from papyrus or parchment, when printing, then on the threshold of its career, demanded a substance of moderate price that would easily receive the impression of movable type. [Sidenote: Development of Movable Type] The idea of movable type was derived from an older practice of carving reverse letters or even whole inscriptions upon blocks of wood so that when they were inked and applied to writing material they would leave a clear impression. Medieval kings and princes frequently had their signatures cut on these blocks of wood or metal, in order to impress them on charters, and a kind of engraving was employed to reproduce pictures or written pages as early as the twelfth century. It was a natural but slow evolution from block-impressing to the practice of casting individual letters in separate little pieces of metal, all of the same height and thickness, and then arranging them in any desired sequence for printing. The great advantage of movable type over the blocks was the infinite variety of work which could be done by simply setting and resetting the type. The actual history of the transition from the use of blocks to movable type--the real invention of modern printing--is shrouded in a good deal of mystery and dispute. It now appears likely that by the year 1450, an obscure Lourens Coster of the Dutch town of Haarlem had devised movable type, that Coster's invention was being utilized by a certain Johan Gutenberg in the German city of Mainz, and that improvements were being added by various other contemporaries. Papal letters of indulgence and a version of the Bible, both printed in 1454, are the earliest monuments of the new art.