This six-volume biographical encyclopedia, published between 1887 and 1889, was one of the first and most definitive works of its kind in America, containing information about thousands of people (some famous, some obscure) in American history. But thirty years after its publication, researchers discovered that a number of the people described in the work were fictitious. Over the years, more and more false entries have been found — to date over 200 of them. But due to the enormity of the work it's doubtful that all of the false information it contains will ever be identified.
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Botany Hoaxes