...This is a very frequent error committed in our intercourse with savage nations, who are as pertinacious of their rights as the monarchs of Europe... 
Captain Frederick Marryat 「The Mission; or Scenes in Africa」
...The only thing they had to fear then was a slip or a stumble, or that in its pertinacious hunt the rhinoceros would tire their horses down...
George Manville Fenn 「Off to the Wilds」
...Under the despised name of curs, Colonel Smith classes the sharpest, thedrollest, the most pertinacious, the most mischievous, and yet the mostuseful terrier; together with several other small dogs...
R. Lee 「Anecdotes of the Habits and Instinct of Animals」
...The flies were an intolerable nuisance, not that they wereextraordinarily numerous, but so insufferably pertinacious...
Ernest Giles 「Australia Twice Traversed, The Romance of Exploration」
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