From a 17th Century manuscript written by Elias Ashmole, now in the Bodleian Library, Oxford.

An excellent way to gett a fayrie, but for myself I call margarett Barrance but this wil obtaine any one that is not all ready bound. First gett a broad square christall or Venus glasse in length and breadth 3 inches, then lay that glasse or christall in the blood of a white henne 3 wednesdayes or 3 fridayes: then take it out and wash it with holy aqua and fumigate it: then take 3 hazel sticks or wands of an yeare groth, pill them fayre and white, and make soe longe as you can write the spiritts name, or fayries name, which you call 3 times, on every sticke being made flatt one side, then bury them under some stone hill whereas you suppose fayries haunt, the wednesdaye befor you call she, and the fridaye following take them up and call she at 8 or 3 or 10 of the clock which be goode plannetts and howres for that turne: but when you calle, be in cleane Life and turn thy face towards the East, and when you have she bind her to that stone or glasse.
An unguentto annoynt under the eylidds and upon the eyelidds evninge and morninge, but especially when you call, or finde your sighte not perfect. Putt sallet oyle into a viall glasse but first wash it withe rose water, and marygold flower water, the flowers be gathered toward the east, wash it til the oyle come white, then putt it into the glasse, ut supra, and put there to the buds of hollyhocke, the flowers of marygold; the flowers or topps of wild time the budds of young hazle, and time must be gatherred neare the side of a hille where fayries use to go oft, and the grasse of a fayrie throne, there, all these putte into the oyle, into the glasse and sett it to dissolve 3 dayes in the sonne, and thou keep it for thy use; ut supra.