We have thus far followed Dr. Mivart step by step through the opening chapters of his book, and have found at each point of our progress abundant materials for reflection. The field he has surveyed with close-gazing eye is varied and extensive; and though many gleaners will come after him laden with fresh sheaves of toilsome gathering, to him belongs the credit of having garnered the first crop of Catholic truth from the seeds which modern science planted. He has done this service, too, for philosophy: that he has enabled us to view modern speculations in the light of the grand old principles of scholastic philosophy, and dispelled the clouds of sophistry which filled up and gilded over the cranks and crannies of modern error. He has appreciated _au juste_ the drift and meaning of that false science which strives to make the beautiful facts of nature the basis of a pernicious philosophy. Not a few of our orthodox friends have hitherto failed to discern the real germ of falsity in the speculations of such men as Tyndall and Huxley and Spencer. They felt that the conclusions arrived at by those writers are false, subversive of reason and morality, but, not being sufficiently versed in the premises wherewith those conclusions were sought to be connected, they were obliged either to hold themselves to a silent protest or to carp and snarl without proof or argument to offer. We should remember that, though principles rest the same, consequences assume Protean shapes, according as a sound or a perverse logic deduces them; and such is the invariable necessity imposed upon the champions of truth that they must, from time to time, cast aside weapons which have done good service against a vanquished foe, and fashion others to deal a fresh thrust wherever they find a flaw in the newly-fashioned armor of error. Catholic thinkers must keep abreast of the times, and we hope that henceforth the opponents of scientism will abandon sarcasm and invective, and, approaching their subject with a fulness of knowledge which will compel the respect of their adversaries, proceed in their work, even as Dr. Mivart has done, with dignity and moderation. [1] _Lessons from Nature as manifested in Mind and Matter._ By St. George Mivart, Ph.D., F.R.S., etc. 8vo, pp. 461. New York: D. Appleton & Co. 1876. SEVILLE. Quien no visto a Sevilla No ha visto a maravilla.