THE JASPER.                                221
	the most powerful of all stones to promote spiritual ecstasy. As concerning the mystic powers associated of old with the Rock Crystal, among the MSS. belonging to Jno. Guthrie, Esqre., of Guthry, Scotland, was a tiny duodecimo volume, in a parchment cover, and in writing of the seventeenth century, filled with prayers, and conjurations for revealing of secrets, and exorcising evil spirits. There are many diagrams, and drawings of figures to be used in these processes ; some of them with reference to lunar, and stellar observations. Among much curious matter we find, An Experiment to be seen with a Christal Stone. " Take a Christall Stone, or Glasse, most clear, without a craise ; and wrape about it a pece of Harte's lether, saying, ' In the name of the Holy Trinity, and of the hey (sic) Deity ! Amen !' Then holde the Christalle in the beam when the sun is most bright, and at the hottest of the day ; and say these conjurations subscribed ; and by and by you shall see the spirite peradventer appeiring himself. Then say to him, ' I conjure Thee, Spirit, by the vertue of all things aforesaid that thou departe out of the Christalle, and bringe with thee thy fellowes in any honest and decente forme, apparelled, some in blew, and some in yealowe. For som tyme he cometh alone, hiding his hede, sometim in a cloke, some tyme in a gowne ;—then commande him, or them, if you worke for thefte, to goe out of the Christall, and that they com againe, brynging or representing the forme, or shape of the thef, or theves, and thyngs stoln, or which shall be stoln,—' et fiat!' And he will brynge with him the theves, and will shew thee with hys finger, and their names, if thou wilt. Alsoe thou maiest aske, and be