... Slowly the sun was darkened, and plaintive murmurings pulsed through the wood...
W. E. B. Du Bois 「The Quest of the Silver Fleece」
...We could hear the birds crooning and cooing in alldirections as we rode, “like the moan of doves in immemorial elms,and the murmurings of innumerable bees...
Ernest Giles 「Australia Twice Traversed, The Romance of Exploration」
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