Read it through once

The cannon-thunder rages, shells scream and crash overhead, the iron rain pours down, one hour, two hours, three, possibly six, then stops; silence follows, but the streets are still empty; the silence continues; by-and-bye a head projects from a cave here and there and yonder, and reconnoitres, cautiously; the silence still continuing, bodies follow heads, and jaded, half smothered creatures group themselves about, stretch their cramped limbs, draw in deep draughts of the grateful fresh air, gossip with the neighbors from the next cave; maybe straggle off home presently, or take a lounge through the town, if the stillness continues; and will scurry to the holes again, by-and-bye, when the war-tempest breaks forth once more.