thereby making faith of no effect; also that he denied the separate existence of the material world and the mind, and that (and probably this is the most serious count in the charge) the substantiality of the mind was subverted, and consequently belief in personal identity rendered impossible. He further said that by Ferrier absolute existence is reduced to a mere relation, and finally, that his conception of a Deity is inadequate, and metaphysics and natural theology are divorced.
We cannot, of course, deal in detail with Ferrier's energetic repudiation of the accusation brought so specifically against him. The heat with which he wrote seems scarcely justified now that we look back on it from the standpoint of more than forty years ahead. But we do not realise how much such accusations meant at the time at which they were made—how they affected not a man's personal advancement only, but also the opinion in which he was held by those for whose opinion he cared the most. The greater toleration of the present day may mean corresponding lack of zeal or interest, but surely it also means a recognition of the fact that men may choose their own methods in the search for truth without thereby endangering the object held in view. Mr. Cairns's attack—without intention, for he was an honourable man and able scholar—was unjust. Ferrier does not claim to prove existence—he accepts it, and only reasons as to what it is; as to the material world, he acknowledges not a mere material world, but one along with which intelligence is and must be known; the separate existence of mind he likewise denies only in so far as to assert that mind without thought is nonsense. The substantiality of the mind he maintains as the one great permanent existence amid all fluctuations and con-
