In the Leland Manuscript it is said that the Masons conceal “the wey of wynninge the facultye of Abrac.” John Locke (though it is doubtful if it was he who wrote a commentary on the manuscript) is quoted as saying: “Here I am utterly in the dark.” However, it means simply the way of acquiring the science of Abrac. The science of Abrac is the knowledge of the power and use of the mystical abraxas, which see; or very likely Abrac is merely an abbreviation of Abracadabra.