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…with e Mountain Viterbo, and with the Village Vico; and are famous for sulphurean boyling Springs. And indeed the Mountain Viterbo seems yet to cherish a great force of fire undmost profound Dens; which t diffuses at its Roots, on the Morthern-side, towards Veterbium, into all the Plain, which is full of a most sulphureous Gas; The Glebes everywhere…
https://www.wichita.edu/academics/fairmount_las/geology/wparcell/Kircher/volcanoes/chapter3.php