Brewer's: Eugubine Tables
Seven bronze tables found near Eugubium (Gubbio) in Italy, in 1444. Of the inscriptions, five are Umbrian and Etruscan, and two are Latin.
“The Umbrian, the tongue of north-eastern Italy, is yet more fully represented to us by the Eugubine tablets ... supposed to be as old as the third and fourth centuries before our era.” -
W. D. Whitney: Study of Languages, lecture vi. p. 220.