There is yet another kind of magic cup known only by tradition, the secret of which, I believe, I was the first to re-discover. It is said that the Chinese knew of old how to make bottles, &c., which appeared to be perfectly plain, but on which, when filled with wine, inscriptions or figures appeared, and which were used in divination as to answer questions. In the winter of 1886-87, Sir Henry Austin Layard went with me through his glass factory at Venice. [23] As we were standing by the furnace watching the workmen it flashed upon me quite in a second how the mysterious old goblets of the Chinese could be made. This would be by blowing a bottle, &c., of thin white glass and putting on the interior in all parts except the pattern, a coating of glass half an inch in thickness. The outside should then be lightly ground, to conceal the heavy portion. If red wine or any dark fluid should then be poured into the bottle the pattern would appear of the same colour. Sir Austin Layard at once sent for his very intelligent foreman, Signor Castellani, who said that he had indeed read of such goblets, but that he regarded it as a fable. But when I explained to him what had occurred to me, he said that it was perfectly possible, but that the great expense of making such objects would probably make the manufacture practically impossible. Apropos of which I may mention that those who would investigate the curiosities of glass, especially the art of making it malleable, may find a great deal in A. Nevi, "De Arte Vitraria" (Amsterdam), and its German translation of 1678 (which contains a chapter, "Wie die Malleabilität dem Glase beygebracht werden könne"). It is probable that the celebrated cup of Djemschid, in Persian story, which showed on its surface all that passed in the world, owed its origin to these Chinese bottles. CHAPTER XV. GYPSY AMULETS. "Knew many an amulet and charm Which would do neither good nor harm, In Rosicrucian lore as learned As he that veré adeptus earned."--Hudibras.