...Commander Peary had taken the North Pole by conquest, in the face ofalmost insuperable natural difficulties, by the tremendousfighting-power of himself... 
Matthew A. Henson 「A Negro Explorer at the North Pole」
...Try and start a solid business scheme, in which you can calculate results in black and white, and the difficulties and discouragements will be almost insuperable...
Various 「Ainslee's, Vol. 15, No. 5, June 1905」
...Others are lower still; most of them even have reached the bottom of the tube and are touching the cork stopper, an insuperable barrier...
J. Henri Fabre Alexander Teixeira de Mattos 「The Life of the Fly」
...Whence arises this insuperable repugnance for provisions to which the family is unaccustomed? Here we may appeal to experiment...
J. Henri Fabre 「More Hunting Wasps」
...Progress is only made by struggling, and the best results are thoseachieved against apparently insuperable difficulties...
Various 「The Journal of Negro History, Vol. I. Jan. 1916」
...They are, furthermore, of no superlative import, since they offer no insuperable obstacle to the introduction of a social order radically different from that of past millenniums...
Sidney L. Gulick 「Evolution Of The Japanese, Social And Psychic」
...But how can we reconcile this view with the known facts of evolution?It meets with difficulties equally great and insuperable in embryology and inphylogeny...
Ernst Haeckel 「The Evolution of Man」
...The alluvial was giving out, and thecosts and difficulties of boring through the rock seemed insuperable...
Henry Handel Richardson 「Australia Felix」
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sandal pantomime spreading
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