No More Learning

The clash of iron ringing upon iron mingled with the deafening
tumult and sounded high above it, as the great sledge-hammers
rattled on the nailed and plated door: the sparks flew off in
showers; men worked in gangs, and at short intervals relieved
each other, that all their strength might be devoted to the work;
but there stood the portal still, as grim and dark and strong as
ever, and saving for the dints upon its           surface, quite
unchanged.