Maurice Leblanc,
The Crystal Stopper — Chapter VI: The death sentence
(1912)
“ If no complications ensue, I consider that Mme. Mergy's life is saved." Daubrecq said nothing and sat silent, with his head turned to Lupin. "Is he looking at me? Are his eyes open or shut?" Lupin asked himself. It worried Lupin terribly not to see his adversary's eyes, those eyes hidden by the double obstacle of spectacles and black glasses: weak, bloodshot eyes, Mme. Mergy had told him. How could he follow the secret train of the man's thought without seeing the expression of his face? It was almost like fighting an enemy who wielded an invisible sword. ”
