Then as to the material elements on which these forces work; the hydrogen, carbon, iron, lime, and the like, the name of elements must be held to mean no more than that they have not as yet been resolved into simpler substances. Of their ultimate composition we know nothing. They may be so many modifications of an ultimate matter; but whether this ultimate matter exists, whether it be, as modern materialists tell us with such confidence, eternal and indestructible, whether impenetrability be one of its properties, whether it be not a kind of polar opposite to the physico-chemical forces, and engendered with them, so that in a different universe, with other forces at work, there must have been different elements, these are all questions of mere speculation, incapable of proof. The physical enquirer has bound himself to consider only the facts which he can observe; and when he tells us that matter is eternal, and that therefore creation is impossible, he is deserting the ground where alone he is strong. Bishop Berkeley's and Collier's denial that matter truly exists is quite as probable as this affirmation. But both alike are speculative guesses and not science. There is a second kingdom to add to the first. The world is not a mere agglomeration of rocks and mountains, seas and lakes. Before the physical forces had completed their work, a new force had been added to them; that of life. The bare rocks became clothed with living moss. In marshy places, warm and moist, a rich vegetation grew and decayed. Along the slopes the interlacing roots of grasses detained the particles of soil which would otherwise have been washed down to some lower bed. The vegetable world, with thousands of varieties, clothed and adorned the stony earth. England's greatness in the present was taken order for in those ages when her coal measures were formed out of the forests which grew rank and died in a climate different in all respects from that which forms the subject of our daily animadversion.