Here is the stumbling-block. A nobleman of high scientific attainment, in company with another nobleman, and a captain in the army, all vouched for this performance of Home. Now could the savage tradition, which attributes flight to convulsive and entranced persons, exercise such an influence on these three educated modern witnesses; could an old piece of folklore, in company with 'expectancy,' so wildly delude them? Can 'high scientific attainments' leave their possessor with such humble powers of observation? But, to be sure, Dr. Carpenter does not tell his readers that there were _three_ witnesses. Dr. Carpenter says that, if we believe Lord Crawford (and his friends), we can 'have no reason for refusing credit to the historical evidence of the demoniacal elevation of Simon Magus'. Let us point out that we have no contemporary evidence at all about Simon's feat, while for Home's, we have the evidence of three living and honourable men, whom Dr. Carpenter might have cross-examined. The doings of Home and of Simon were parallel, but nothing can be more different than the nature of the evidence for what they are said to have done. This, perhaps, might have been patent to a man like Dr. Carpenter of 'early scientific training'. But he illustrated his own doctrine of 'the dominant idea'; he did not see that he was guilty of a fallacy, because his 'idea' dominated him. Stumbling into as deep a gulf, Dr. Carpenter put Lord Crawford's evidence (he omitted that of his friends) on a level with, or below, the depositions of witnesses as to 'the aerial transport of witches to attend their demoniacal festivities'. But who ever swore that he _saw_ witches so transported? The evidence was not to witnessed facts, but only to a current belief, backed by confessions under torture. No testimony could be less on a par with that of a living 'nobleman of high scientific attainments,' to his own experience. In three pages Dr. Carpenter has shown that 'early scientific training' in physiology and pathology, does not necessarily enable its possessor to state a case fully. Nor does it prompt him to discriminate between rumours coming, a hundred and fifty years after the date of the alleged occurrences, from a remote, credulous, and unscientific age: and the statements of witnesses all living, all honourable, and, in one case, of 'high scientific attainments.' {327} It is this solemn belief in his own infallibility as a judge of evidence combined with his almost incredible ignorance of what evidence is, that makes Dr. Carpenter such an amusing controversialist.