...—Up to a broad range of high mountains of lightgrey granite; there are deep dells on the top filled with gigantictrees, and having running rills in them... 
David Livingstone 「The Last Journals of David Livingstone, in Central Africa, from 1865 to His Death, Volume II (of 2), 1869-1873」
...I rode over an open plain, or open forest country, soon foundthe dells marked by water-courses, and, at length, the channel of a river,with the Yarra trees...
Thomas Mitchell 「Journal of an Expedition into the Interior of Tropical Australia」
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unevenness poplar foundations
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