...The editors vouch for its authenticity,and state it to be in Benjamin's own handwriting... 
W. E. B. Du Bois 「The Suppression of the African Slave Trade to the United States of America」
... Ramsay's reputation into dispute, his work would fall of course, as of no authenticity...
Thomas Clarkson 「An Essay on the Slavery and Commerce of the Human Species, Particularly the African」
...The authenticity of thisanecdote need not be doubted...
Edward Jesse 「Anecdotes of Dogs」
...Bloxam read a paper in which he denied the authenticity of this monument, which had previously been regarded as one of the oldest monumental stones extant...
George S. Phillips 「The New Guide to Peterborough Cathedral」
...But Mr Bloxam read apaper at Peterborough in 1861 in which he disputed the authenticity ofthis monument, which had been previously regarded as one of the mostancient monumental stones extant...
W.D. Sweeting 「The Cathedral Church of Peterborough」
...This fact proves what needs no proving, that there are many wealthyconnoisseurs who buy works of art not for their intrinsic merit, butfor what is supposed to be their authenticity...
Anthony M. Ludovici 「Nietzsche and Art」
...A cable from the Slovakian Ambassador had arrived afew hours later, denying her authenticity...
Various 「Astounding Stories of Super-Science, October, 1930」
...Firstly, only a few records of very ancient astronomy areextant, and the authenticity of many of these is open to doubt...
George Forbes 「History of Astronomy」
... The authenticity of this work has been doubted...
David Brewster 「The Martyrs of Science, or, The lives of Galileo, Tycho Brahe, and Kepler」
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