Having left this dazzling palace, we continued our underground ramble, penetrating more and more into the bowels of the earth, following step by step a winding labyrinth, but which for a whole half-league offered nothing remarkable to our view, except now and then the sight of the very great dangers our Undauntable curiosity urged us on to.
"Adventures in the Philippine Islands"
Paul P. de La Gironière
Virile in movement, a striking figure, there seemed all of command, something heroic even in the rugged strength, something absolutely Undauntable about the man.
"The Belovéd Traitor"
Frank L. Packard
Having a tempter about him of Vautrin's calibre, strong, Undauntable, as humorous as Dickens' Jingle, but infinitely more unscrupulous and dangerous, Rastignac is gained over, in spite of his first repulsion.
"Balzac"
Frederick Lawton