Such, unless most unintentionally injured by compression, is Hume's famous argument against miracles, of which the author was sufficiently proud to boast openly that in it he had discovered what 'will be useful, as long as the world endures,' as 'an everlasting check to all kinds of superstitious delusion,' but which, as I nevertheless venture to repeat, is compounded in about equal moieties of transparent sophism and baseless assumption. For is it not the veriest juggle of words to insist on the necessary inferiority of copies to an original, without adverting to the indispensable proviso that the original with which the copies are compared should be the original from which the copies have been taken? May not a copy of Leonardo Da Vinci's 'Last Supper' quite possibly be equal in force and vividness of expression to the original painting by Benjamin West bearing the same name? Might it not be wise to trust rather to an Airy, or a De la Rue, or a Lockyer's account of what he had observed during a solar eclipse than to your own immediate observations on the same occasion? Besides, this first branch of Hume's argument, if sound, would tell quite as much for, as against, miracles, rendering it equally incumbent on actual witnesses to believe, as on all but actual witnesses to disbelieve. If you are always to prefer your own original experience to mere descriptions given by other people of theirs, then should it happen to be yourself to whom the sun appeared in the west at an hour when, according to custom, he ought to have been in the east, you are not to allow the protestations of any number of persons who, happening at the time to have been looking the other way, saw the sun in his usual place, to persuade you that what you saw was a mock sun or an _ignis fatuus_. Rather than imagine that your own senses can have deceived you, you are to suppose that all about you are in a league to deceive you. For precisely the same reason for which you should reject even universal testimony in favour of a miracle which you have not witnessed, you are equally to reject universal testimony in opposition to a miracle the similitude of which you have witnessed.