... But a difficulty, still more insuperable, presented itself, in an occurrence which took place in the year 1791, but which is much too delicate to be mentioned... 
Thomas Clarkson 「The History of the Rise, Progress and Accomplishment of the」
...God has interposed an insuperable obstacle to any such result...
Frederick Douglass 「My Bondage and My Freedom」
...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」
...There were difficulties—theyhad seemed insuperable, but love would surmount them...
Charles W. Chesnutt 「The House Behind the Cedars」
...That is a question it would be premature to discuss now; but if the attempt should ever be made, the difficulties would not perhaps be found insuperable...
W. H. Hudson 「Birds in Town and Village」
...The Pompilus therefore feels an insuperable reluctance to make straight for the Spider when the latter is at home in the midst of her snares...
J. Henri Fabre 「More Hunting Wasps」
...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」
...Facts were insuperable as facts; they could, however, be overcomespiritually—that is to say, by concepts...
Anthony M. Ludovici 「Nietzsche and Art」
...And yet there was adifficulty in accepting the theory which seemed insuperable...
Simon Newcomb 「Side-lights on Astronomy and Kindred Fields of Popular Science」
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