The Hand of Glory is the dried and pickled hand of a man who has been hanged, often specified as being the left (Latin: sinister) hand, or, if the man were hanged for murder, the hand that "did the deed."
Old European beliefs attribute great powers to a Hand of Glory combined with a candle made from fat from the corpse of the same malefactor who died on the gallows. The candle so made, lighted, and placed (as if in a candlestick) in the Hand of Glory, would have rendered motionless all persons to whom it was presented. The process for preparing the hand and the candle are described in 18th century documents, with certain steps disputed due to difficulty in properly translating phrases from that era. The concept inspired short stories and poems in the 19th century.
Etymologist Walter Skeat reports that, while folklore has long attributed mystical powers to a dead man's hand, the specific phrase "Hand of Glory" is in fact a folk etymology: it derives from the French main de gloire, a corruption of mandragore, which is to say mandrake. Skeat writes, "The identification of the hand of glory with the mandrake is clinched by the statement in Cockayne's Leechdoms, i. 245, that the mandrake "shineth by night altogether like a lamp". Cockayne in turn is quoting Pseudo-Apuleius, in a translation of a Saxon manuscript of his Herbarium.
According to old European beliefs, a candle made of the fat from a who died on the gallows, lighted, and placed (as if in a candlestick) in the Hand of Glory, which comes from the same man as the fat in the candle, this would render motionless all persons to whom it was presented. The method for holding the candle is sketched in Petit Albert. The candle could be put out only with milk. In another version, the hair of the dead man is used as a wick, and the candle would give light only to the holder. The Hand of Glory also purportedly had the power to unlock any door it came across. The method of making a Hand of Glory is described in Petit Albert, and in the Compendium Maleficarum.