That the peculiar property of the manufacture at this period was its clear and crystal appearance is abundantly evident; and this, and the great degree of perfection to which the manufacture of white or crystal-like glass was carried, are by many writers thought to have been proved from classical sources,--Horace and Virgil both referring to it, the one speaking of its beautiful lustre and brilliancy, the other comparing it to the clearness of the waters of the Fucine Lake. The decline of this art in Rome is clearly defined by various writers; and its gradual introduction into Bohemia and Venice is plainly marked out. At this latter place the art flourished to a remarkable degree, and being marked by constant progress and improvement, enabled Venice to supply the world without a rival, and with the beautiful manufacture called "Venice drinking-cups." The beauty and value of these are abundantly testified to by many authors, among whom is Holinshed, referred to previously. The manufacture of these and similar articles were located, as stated in the "Chronicles," at Murano, a place about one mile from the city, where the business was carried on, and assumed a high position in the order of the arts. And from thence we are enabled to date its future progress and gradual introduction into Europe, Germany, England, and the Western World. It is not strange that the strict secrecy with which the business was conducted in these times, should have invested the art with an air of romance; and legends, probably invented for the purpose, created a maximum of wonder among the uninitiated. The government of Venice also added, by its course, to the popular notions regarding the high mystery of the art, conferring, as it did, the title of "Gentleman" (no idle title in those days) on all who became accomplished in the manufacture. Howell, in his "Familiar Letters," dated from Venice in 1621, says: "Not without reason, it being a rare kind of knowledge and chemistry, to transmute the dull bodies of dust and sand, for they are the only ingredients, to such pellucid, dainty body, as we see crystal glass is." That the art had greatly improved in the hands of the Venetian artisans cannot be doubted. The manufacture was carried to a degree far beyond any previous period; and the more so, because sustained by the governmental protection and patronage. Venice being then in the height of her commercial glory, she herself being "Queen of the Sea," ample facilities existed for the exportation of her manufactures to every part of the known world; and for a long period she held the monopoly of supplying the cities of Europe with crystal glass in its various departments of ornament and utility.