In the sixth century, some Persian monks, who had penetrated into China, gained an acquaintance with the source whence silk is derived--a secret till then guarded with scrupulous care. They brought back with them to Constantinople a quantity of eggs enclosed in a hollow cane, which produced “the progenitors of all the generations of silk-worms which have since been reared in Europe and the western parts of Asia.” For nearly six hundred years, Constantinople and the territories of the Greek empire continued to monopolize the production of silken fabrics; till, in the twelfth century, the manufacture was introduced into Sicily, and thence successively into Italy, Spain, and France; until, finally, it reached England. The culture of the mulberry-tree was extensively introduced wherever the climate permitted. Bologna, Modena, Venice, Genoa, and Florence were all noted for their silk manufactures, and produced silken tissues for the rest of Europe; till, in the sixteenth century, the rearing of the worm and the weaving of silk were introduced into Lyons and the south of France, since which period the French have acquired and maintained a superiority in this branch of the useful arts. In this historical sketch we may observe many important points:--First, we see a manufacture in a stationary state of high perfection for thousands of years in the East; then follows its slow progress westward during the ages of Greece and Rome; next the loss to Italy and Europe of the bare knowledge of the material product, on the fall of the Roman empire; then the revival and cultivation of the manufacture in the metropolis of the Eastern empire; succeeded by its introduction thence into Sicily, and a rapid improvement effected by the enterprise of Italian cities; till, finally, it spread wherever circumstances were favorable. The account of any such manufacture well remembered, is a kind of epitome of the history of the time through which we mark its progress. To make the sketch true in all its parts we need only add, that a Frenchman invented a loom to make woven silks, whose patterns rival the slow produce of Eastern patience, while England has shown her accustomed superiority in the effecting by machinery of all processes required antecedent to weaving.