Maurice Leblanc,
Memoirs of Arsène Lupin
(1925)
“ When I told you a little while ago that the possession of the casket must have revealed the indispensable word to the Baron and Beaumagnan, I just wanted to frighten you and make you loose your hold on Clarice, for these gentlemen were simply puzzled. But the indispensable word is there, all right. It’s there, mixed with the five Latin words. Instead of blanching as you all did in the face of this vague formula you ought, quite naïvely, to have read it, to have put the first five letters together, and to have studied the word composed of those five initials. ”
