...Why, even here, close at hand, among our neighbours the Zulus, there have been happenings—well authenticated, mind you—that are absolutely unexplainable by any knowledge that we whites possess... 
Harry Collingwood 「The Adventures of Dick Maitland」
...No case of the direct action of the pollen of one variety on another is better authenticated or more remarkable than that of the common apple...
Charles Darwin 「The Variation of Animals and Plants Under Domestication, Vol. I.」
...Other species reported fromthe state but not authenticated by specimens have been relegated tothe Hypothetical List and their names and my remarks concerningthese birds are enclosed in brackets...
Harrison B Tordoff 「Check-list of the Birds of Kansas」
...He hadjust heard a story which his common sense told him couldn't be true,but which the evidence of his eyes had grimly authenticated...
Various 「Astounding Stories, February, 1931」
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