...But, as if the spirit of the imperturbable Aramis had covered him with his infallibility, instead of appearing disconcerted, Philippe rose... 
Alexandre Dumas, Pere 「The Man in the Iron Mask」
... “Ah!” exclaimed De Wardes, furious at this imperturbable coolness, “one can clearly see you are half a bastard, M...
Alexandre Dumas, Pere 「Ten Years Later」
...de Guiche,” replied Madame Henrietta, with imperturbable self-possession; “I have heard he is a very dear friend of yours...
Alexandre Dumas, Pere 「Louise de la Valliere」
...Chambertin, which must have wearied through frequent repetition,” retorted Blakeney with the same imperturbable smile...
Baroness Orczy 「El Dorado」
... Chauvelin had waited with his usual patience, silent and imperturbable, while the young man read...
Baroness Orczy 「El Dorado」
...It can hardlybe assumed that he felt no fear; yet, if he did, he hid it perfectlybeneath an imperturbable mask of coolness...
Edgar Rice Burroughs 「Tarzan the Untamed」
...” queried his imperturbable enemy...
Baroness Emmuska Orczy 「The Elusive Pimpernel」
...He offered an imperturbable take-it-or-leave-it stolidity...
Stewart Edward White 「African Camp Fires」
...While we were cooking supper the wagon passed us, its wheels and frame creaking, its great whip cracking like a rifle, its men shrieking at the imperturbable team of eighteen oxen...
Stewart Edward White 「African Camp Fires」
... Meanwhile the men above-stairs lingered in the Colonel's office—the older one perturbed and sputtering, the younger insistent and imperturbable...
W. E. B. Du Bois 「The Quest of the Silver Fleece」
..." A restless stirring, and the battery of eyes was turned upon that imperturbable gentleman, as if he were some strange animal...
W. E. B. Du Bois 「The Quest of the Silver Fleece」
...They are, in fact, constructed on Dutch proportions, andare imbued, as a natural consequence, with those imperturbable andsteady-going habits so characteristic of the bulbous bottomedHollander...
Ambrose Blacklock 「A Treatise on Sheep:」
...The others, the workers, are imperturbable in their good-humour...
J. Henri Fabre Alexander Teixeira de Mattos 「The Mason-bees」
...She remains imperturbable, she, the dwarf, in the presence of the colossus who could crush her with one blow...
J. Henri Fabre 「Bramble-bees and Others」
...With imperturbable andmeasured regularity, for hours on end, "kew, kew," the bird spits outits cantata to the moon...
J. H. Fabre 「The Wonders of Instinct」
...He was smoothly imperturbable...
Various 「Astounding Stories of Super-Science September 1930」
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