London: The Mining Magazine, 1912. Translated into English from the first Latin edition of 1556 by Hoover and his wife, Lou Henry Hoover, and signed by them on front free endpaper, annotated: "Signed at The White House/ Feb 22, 1933." Folio. Illustrated with numerous full page and in-text illustrations reproducing the original 1556 woodcuts. Publisher's full vellum binding, spotted and partly affected by damp; dampstaining to top right of title-page and corresponding sections of first several leaves; other scattered dampstaining; some scattered darkening.