...We traversed at least a dozen marshy ravines, the depth of mire and water in which caused the utmost anxiety... 
Henry M. Stanley 「How I Found Livingstone」
... Deep ravines and chasms afford outlets to the numerous streams and rivers which take their rise in the background; the pale fleecy ether almost always shrouds its summit...
Henry M. Stanley 「How I Found Livingstone」
...The very nature of the country showed that it must be full of ravines, and yet I could not help hoping against hope that we might have a clear mile of road without a break...
Samuel White Baker 「In the Heart of Africa」
...Hemmed in on all sides, amid a shower of lances and stones thrown from the mountain above, the Turks fled pell-mell down the rocky and precipitous ravines...
Samuel White Baker 「In the Heart of Africa」
...As we proceeded, the country became rougher, the ravines more precipitous...
Stewart Edward White 「African Camp Fires」
...To them meandered long, narrow ravines full of low brush, like thin, wavering streaks of gray...
Stewart Edward White 「African Camp Fires」
...But at thesame time, when beset by a blizzard, he would wisely seek shelter fromit in some narrow and deep valley or system of ravines...
William T. Hornaday 「The Extermination of the American Bison」
...These peculiar brownish gray colored birds frequent the tangledunderbrush of ravines and mountain sides where they leadthe life of a recluse...
Chester A. Reed 「The Bird Book」
...The best places in which to set for fishers is in the timbered ravines, especially where two ravines join...
Elmer Harry Kreps 「Science of Trapping」
...We frequently foundon the rocks and in the ravines deposits of very perfectshells, apparently those of oysters...
W. E. Webb 「Buffalo Land」
...The dog, if habituated to"seek" without your companionship, will readily hunt morasses and ravines,where you might find it difficult to accompany him...
Dinks, Mayhew, and Hutchinson 「The Dog」
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