As an instance of this we may take from an old German book[292] the tale of a lovelorn maiden who seeks the aid of an enchantress to learn whether she will marry her lover, upon whom her parents look with disfavor. The mystic crystal is brought out wrapped in a yellow handkerchief, and is placed in a green bowl beneath which is spread a blue cloth, the reflections from these different colors being probably calculated to stimulate the optic nerve and favor the appearance of some picture upon the polished surface of the crystal. The young girl, in rapt attention, looks long and earnestly; at last she cries out that she sees her own form and that of her lover. Both look pale and sad, and they appear to be about to set forth upon a long and perilous journey, for the lover wears riding-boots and carries a brace of pistols. The girl is so terrified at the sight that she faints away. The sequel of this vision is a runaway match, and we can easily understand that when the lover proposed this adventure, the girl believed that it was written in the book of fate and willingly agreed to undertake it. The great humorous poem “Hudibras,” wherein all the foibles of the seventeenth century are castigated, does not fail to make mention of Dee and Kelley and their crystal. Of the sorcerer whose aid Hudibras seeks we are told:[293] He’d read Dee’s prefaces before, The Dev’l and Euclid o’er and o’er; And all th’ intrigues ’twixt him and Kelley, Lascus and th’ Emperor, would tell ye. Kelley did all his feats upon The devil’s looking-glass, a stone Where, playing with him at bo-peep He solved all problems ne’er so deep.