ppl. a.
1786. Polwhele, trans. Theocritus, etc. (1792), II. 212. Amidst the legends of superstition, it is in vain we search for well-authenticated truths.
1820. W. Irving, Sk. Bk., Spectre Bridegroom. Events of the kind are extremely common in Germany, as many well authenticated histories bear witness.
1879. Lubbock, Sci. Lect., v. 167. I have endeavoured to select only those arguments which rest on well-authenticated facts.