Blanchet says that paper was invented in China by Tsai Loon, for purposes of writing. He used fibres of bark, hemp, rags, etc. In 105 A. D. he reported to the government on his process, which was highly approved. He was given the honorary title of Marquis and other honors. The first paper book was brought to Japan from Corea, then a part of China, in 285. The conquest of Turkestan by the Arabs, through which they learned the manufacture of paper, came in the battle fought on the banks of the River Tharaz, in July, 751. Chinese captives brought the art to Samarcand, from which place it spread rapidly to other parts of the Arabian Empire. Damascus was one of the first places to receive it. In Egypt, paper began to take the place of papyrus in the ninth century, and papyrus ceased to be used in the tenth. The Arabian paper was made of rags, chiefly linen, and sized with wheat starch. European paper of the thirteenth century shows, under the microscope, fibres of flax and hemp, with traces of cotton. About 1400, animal glue was first used for sizing. The common belief that Arabian and early European paper was made of cotton is a mistake. There has never been any paper made of raw cotton, and cotton paper anywhere is exceptional. In 1145, when the troops of Abd el Mounin were about to attack the capital of Fez, the inhabitants covered the vault of the mihrab of the mosque with paper, and put upon this a coating of plaster, in order to preserve from destruction the fine carvings which are still the admiration of visitors. The mihrab of an Arabic mosque is a vaulted niche or alcove, in which the altar stands and towards which the worshippers look while they pray. This is probably the earliest approach to the use of wall-paper and shows the excellent quality of the paper. Herbert Spencer states that "Dolls, blue-books, paper-hangings are lineally descended from the rude sculpture paintings in which the Egyptians represented the triumphs and worship of their god-kings." No doubt this is true, but the beginning of paper, and probably of wall-paper, was in China.