Anthony Melville Rud, The Devil's Heirloom — Chapter X (1922)
“ Cube explained and demonstrated, and then the two approached the section of wall in which the door to the secret passage was located. Lacey realized that perhaps his greatest danger now would come from the weapon in his companion’s hands, yet between himself and Krahn lay an unexpressed kinship of liking for unusual adventure which possesses an etiquette of silence all its own. Men will risk serious injury or even death itself for it, rather than take the obvious and commonsense course of obviating risk to which they have committed themselves. ”
