Thomas Ashby, 1911 Encyclopædia Britannica, Volume 21… (1911)
“ The medieval town was founded in the 10th century (?) on a hill 490 ft above sea-level, by refugees from the Roman town of Privernum, lower down (118 ft. above sea-level) on the highroad, 11⁄4 m. to the north, at the mouth of a low pass leading through the Volscian mountains to the valley of the Sacco. ”
