...The noise continued—not amutter, but a steady rumbling flow as solid as the blare of a trumpet... 
John Buchan 「Mr. Standfast」
...One of them made a low, rumbling sound in its throat...
Edgar Rice Burroughs 「Tarzan the Terrible」
...About half-past eight, as Mr Baker lay asleep, he fancied that he heard a rumbling like distant thunder...
W.H.G. Kingston 「Great African Travellers」
...Enormous dock-taileddray-horses emerged with ponderous waggons heaped up to the very skies,while others would come rumbling in, laden with wheat, potatoes, and otherstarch-making ingredients...
R. S. Surtees 「Mr. Sponge's Sporting Tour」
...It seemed to me that the storm lastedfor hours; but at last it moved off up the valley, the flashes grew tobe a mere glimmer, and the thunder mere rumbling...
Elinore Pruitt Stewart 「Letters on an Elk Hunt」
...He swung along rapidly, rumbling the low call in histhroat...
William J. Long 「Wood Folk at School」
...TheMillets got into a rumbling old cart and startedin search of the place which ended in "zon"near the forest of Fontainebleau...
Dolores Bacon 「Pictures Every Child Should Know」
..."Careful, my Babs!" His voice was a throaty, rumbling roar from aboveus...
Various 「Astounding Stories, March, 1931」
...We dared to talk in low tones; the rumbling voices and footstepsoutside would make our tiny voices inaudible to Polter...
Various 「Astounding Stories, March, 1931」
...The whole sky was roaring and rumbling with our shouts andour panting breathing, and the ground was clattering, pounding withour giant tread...
Various 「Astounding Stories, March, 1931」
...As the earth people seated themselves on the skins that made up thecouch they were both conscious of a far-away rumbling like peals ofthunder...
Various 「Astounding Stories of Super-Science, October, 1930」
...Even as the old chieftain spoke a gigantic rumbling, greater inintensity than any heretofore, shook the electron...
Various 「Astounding Stories of Super-Science, October, 1930」
...A crackling, rumbling sound caused him to turn quickly...
Various 「Astounding Stories of Super-Science, June, 1930」
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