...Athos, who had no knowledge of commercial matters, felt himself a little embarrassed by material obstacles and the majesty of those who were thus employed... 
Alexandre Dumas, Pere 「The Man in the Iron Mask」
... No longer did the giant tree spreadits branches above the wooden rampart; but ordinary man-made defenseswere scarce considered obstacles by Korak...
Edgar Rice Burroughs 「The Son of Tarzan」
...There are, however, many and serious obstacles to a continued navigation for hundreds of miles at a stretch...
David Livingstone 「Missionary Travels and Researches in South Africa」
...Stanley has done his part with untiringenergy; good judgment in the teeth of very serious obstacles...
David Livingstone 「The Last Journals of David Livingstone, in Central Africa, from 1865 to His Death, Volume II (of 2), 1869-1873」
...Can I hope for ultimate success? Somany obstacles have arisen...
David Livingstone 「The Last Journals of David Livingstone, in Central Africa, from 1865 to His Death, Volume II (of 2), 1869-1873」
...I was now convinced, by painful experience,that the obstacles to my farther progress wereinsurmountable...
Mungo Park 「Travels in the Interior of Africa, Vol. 2 [of 2]」
...I am inclined to throw no obstacles in the way of the execution of the law of the land...
William Wells Brown 「Clotelle」
...This he found it difficult to do, for,turn which way he would, fresh obstacles confronted him...
Leo Tolstoy 「The Kreutzer Sonata and Other Stories」
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