Read it through once

Of a sudden the guns on the slope roared out a message of warning. A spluttering sound had begun in the woods. It swelled with amazing speed to a profound clamor that involved the earth in noises. The splitting crashes swept along the lines until an interminable roar was developed. To those in the midst of it it became a din fitted to the universe. It was the whirring and thumping of gigantic machinery, complications among the smaller stars. The youth’s ears were filled cups. They were incapable of hearing more.