This is not a challenge to the curious casuist or the sneering infidel; but an invitation to the honest mind harassed by unanswered queries: no gauntlet thrown down, but a brother's hand stretched out. Such questions, if put to the writer, through his publisher by letter, may find their reply in a future edition: supposing, that is to say, that they deserve an answer, whether as regards their own merits or the temper of the mind who doubts; and supposing also that the writer has the power and means to answer them discreetly. It is only a fair rule of philanthropy (and that without arrogating any unusual "strength") to "bear the infirmities of the weak, and not to please ourselves:" and nothing would to me give greater happiness than to be able, as I am willing, to remove any difficulties lying in the track of Faith before a generous mind. I hang out no glistening holly-bush a-flame with its ostentatious berries as promising good wine; but rather over my portal is the humbler and hospitable mistletoe, assuring every wearied pilgrim in the way, that though scanty be the fare, he shall find a hearty welcome. CONCLUSION. I have thus endeavoured (with solicited help of Heaven) to place before the world anew a few old truths: truths inestimably precious. Remember, they cannot have lost by any such advocacy as is contained in the idea of their being shown antecedently probable; for this idea affects not at all the fact of their existence; the thing is; whether probable or not; there is, in esse, an ornithorhyncus; its posse is drowned in esse: there exists no doubt of it: evidence, whether of senses physical, or of considerations moral, puts the circumstance beyond the sphere of disputation. But such truths as we have spoken of do, nevertheless, gain something as to--not their merits, these are all their own substantially; nor their positive proofs, these are adjectives properly attendant on them, but as to--their acceptability among the incredulous of men; they gain, I say, even by such poor pleading as mine, from being shown anteriorly probable. Take an illustration in the case of that strange and anomalous creature mentioned just above. Its habitat is in a land where plums grow with the stones outside, where aboriginal dogs have never been heard to bark, where birds are found covered with hair, and where mammals jump about like frogs! If these are shown to be literal facts, the mind is thereby well prepared for any animal monstrosity: and it staggers not in unbelief (on evidence of honest travellers) even when informed of a creature with a duck's bill and a beaver's body: it really amounted in Australia to an antecedent probability.