...I never saw such cowardice as the redoubtable Kamrasi exhibited... 
Samuel White Baker 「In the Heart of Africa」
...We again landed, as on the preceding day, and met the redoubtable King Freeman, and twenty-three other kings and headmen from the tribes in the vicinity...
Horatio Bridge 「Journal of an African Cruiser」
...When theWolfhounds were benched, Finn had his sister upon his right, and (though henever suspected it) his redoubtable sire, the great Champion Dermot Asthore, onhis left...
A. J. Dawson 「Finn The Wolfhound」
...This redoubtable problem, however, is solved in the construction of this curious little instrument that every butterfly carries...
W. S. Coleman 「British Butterfiles」
...Asthat king seldom during his reign frequented places of public resort, MrCross was invited to bring Jerry to Windsor or Brighton, to display thetalents of his redoubtable baboon...
Various 「Heads and Tales」
...With savage but curious eyes he watched the man, with no thought ofattacking alone so redoubtable a foe...
Charles G. D. Roberts 「The Watchers of the Trails」
... this redoubtable crew probablythe queerest was Jimmie O’Hara...
Various 「Astounding Stories of Super-Science, March 1930」
...Nickel is commonly found in iron meteorites, so that it might be said that that redoubtable alloy nickel-steel is of cosmical invention...
Garrett Serviss 「Curiosities of the Sky」
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