IV. Now, in the first place--and this is rather an important point--it is no sign of deadness in a present art that it borrows or imitates, but only if it borrows without paying interest, or if it imitates without choice. The art of a great nation, which is developed without any acquaintance with nobler examples than its own early efforts furnish, exhibits always the most consistent and comprehensible growth, and perhaps is regarded usually as peculiarly venerable in its self-origination. But there is something to my mind more majestic yet in the life of an architecture like that of the Lombards, rude and infantine in itself, and surrounded by fragments of a nobler art of which it is quick in admiration and ready in imitation, and yet so strong in its own new instincts that it re-constructs and re-arranges every fragment that it copies or borrows into harmony with its own thoughts,--a harmony at first disjointed and awkward, but completed in the end, and fused into perfect organisation; all the borrowed elements being subordinated to its own primal, unchanged life. I do not know any sensation more exquisite than the discovering of the evidence of this magnificent struggle into independent existence; the detection of the borrowed thoughts, nay, the finding of the actual blocks and stones carved by other hands and in other ages, wrought into the new walls, with a new expression and purpose given to them, like the blocks of unsubdued rocks (to go back to our former simile) which we find in the heart of the lava current, great witnesses to the power which has fused all but those calcined fragments into the mass of its homogeneous fire.