...Dimly he knew they were soaring still higher as their radio picked upthe warning of an approaching patrol ship; vaguely he realized thatthey descended again to a level of observation... 
Various 「Astounding Stories, August, 1931」
... Hidden under the branches, in order to escape the observation of the enemy’s birdmen, the French cannon were scattered among the hills and hollows of the highland range...
Vicente Blasco Ibanez Charlotte Brewster Jordan 「The Four Horsemen of the Apocalypse」
...Our captain of musketeers, a man of sure and rapid observation, took it all in at a glance; and having run over the groups, his eye rested on a man in front of him...
Alexandre Dumas, Pere 「The Man in the Iron Mask」
...de Guiche, dressed as we have described, looked so handsome that he excited every one’s observation...
Alexandre Dumas, Pere 「Ten Years Later」
... “You did not say anything; you disapprove of my observation...
Alexandre Dumas, Pere 「Louise de la Valliere」
...He, too, felt that he would indeed be safer from observation in a crowded theatre than in the streets...
Baroness Orczy 「El Dorado」
...There were a good many unlighted doorways along the quay, whilst a street lamp was fixed on a bracket in the wall of the very house which he kept in observation...
Baroness Orczy 「El Dorado」
...Sapt’s devices for securing freedom from observation had served well, and Rudolf mounted unmolested...
Anthony Hope 「Rupert of Hentzau」
...The few who came under my observation possessed much of the Bushman or Hottentot feature, and were dressed in strips of soft bark hanging from the waist to the knee...
David Livingstone 「Missionary Travels and Researches in South Africa」
...The white ant keeps generally out of sight, and works under galleries constructed by night to screen them from the observation of birds...
David Livingstone 「Missionary Travels and Researches in South Africa」
... We came to a great many little villages among the hills, as if the inhabitants had reason to hide themselves from the observation of their enemies...
David Livingstone 「Missionary Travels and Researches in South Africa」
...There soon appeared the strongest reasons to concur in this opinion, the result of long and close observation in the Islands where Mr...
Thomas Clarkson 「The History of the Rise, Progress and Accomplishment of the」
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