The Chinese assert that the discovery of the use of silk and how to weave it took place in the year B.C. 2,697, and great secrecy was observed as to how the silkworm was reared and how the cocoon was unwound; and Chinese laws forbade under penalty of death the divulgation of the secret and the exportation beyond the limits of the Celestial Empire of the seed of the mulberry and the eggs of the worm. However, about three thousand years later, in the year A.D. 400, a Chinese princess married the King of Khotan on the borders of Turkestan, and she, at the peril of her life, carried off some of the grains of mulberry and the eggs of the caterpillar, and by this means introduced the culture of silk into the domains of the king. Some years later, in 462, Japan got possession of the means of sericulture by a similar method. From Khotan the industry slowly spread to Persia and India. A century and a half later, about 550, two monks of Mount Athos, but of Persian origin, went to preach Christianity in the unknown regions beyond the Caspian Sea. These courageous apostles penetrated to Khotan, and there discovered whence came the silk stuffs that found their way into Europe in small quantities, and which were so costly that they sold for their weight in gold. Rejoiced at their discovery, the monks schemed how they might make Greece benefit by it. This, however, was not easy, as the inhabitants of Khotan, knowing the value of their industry, had, like the Chinese, forbidden the exportation of the seeds of the mulberry and the eggs of the silkworm. The monks employed craft. In all caution and secrecy they collected mulberries, crushed them in water, and obtaining thus the seed alone, dried it and enclosed it in their hollow bamboo canes. Then they departed on their return journey. On reaching Greece they related their adventures and sowed the seed. The young plants did not fail to spring up, and thus was Greece supplied with the precious tree that is to-day spread along all the coast of the Mediterranean. But they had not done enough. Only half of their self-imposed task was accomplished. The Emperor Justinian sent for the monks, listened to their narrative, gave them money, and urged them to return into the East and obtain a supply of the bombyx grain. Nothing loath they started, arrived in Khotan, and in much the same manner as before secreted and brought to Europe in all haste the eggs that would hatch out in spring. The date of their return was 553. Meanwhile the young mulberries had grown vigorously, and when the worms issued from their shells they found abundant nourishment. They passed through their several stages of development and gave vigorous descendants.