Maurice Leblanc,
The Extraordinary Adventures of Arsene Lupin…
(1910)
“ But he knew also that any miracle might be expected from Arsene Lupin. Moreover, that exact knowledge of the castle, the location of the pictures and furniture, gave the affair an alarming aspect. How could he have acquired that information concerning things that no one had ever seen? The baron raised his eyes and contemplated the stern outlines of the castle, its steep rocky pedestal, the depth of the surrounding water, and shrugged his shoulders. Certainly, there was no danger. No one in the world could force an entrance to the sanctuary that contained his priceless treasures. ”
