The gray, boulder-chafed river was singing loudly through the valley, but above its massy roar I heard the booming of a waterfall, which drew me eagerly on; and just as I emerged from the tangled groves and brier-thickets at the head of the valley, the main fork of the river came in sight, falling fresh from its glacier fountains in a snowy cascade, between granite walls 2000 feet high.

It was the first time I had ever seen artillery fire at night, though I had heard it often enough by then in France and in Belgium, and even in Germany; for when the wind blew out of the west we could hear in Aix-la-Chapelle the faint booming of the great cannons before Antwerp, days and nights on end.

The kettle-drums ceased their booming.

"Yet, you must not picture me as sitting there, free from strain; for the nerve tension was so great that my heart action was a little out of normal control, the blood beat making a dull booming at times in my ears, with the result that I had the sensation that I could not hear acutely.

Far off toward the stone bridge, now a mile or more northeast of them, they could see the Union flags waving, and mark the white puffs of smoke that preceded the booming of the cannon.

These were sounds, too, like the flapping of great sails, a thousand at a time, and sometimes reports that resembled more than anything else the distant booming of enormous drums.