Sax Rohmer,
Bat Wing — Chapter XXVII
(1921)
“ I passed on, and considering the matter impartially, found myself faced by the questions—Whose was the shadow which Harley had seen upon the blind? And with what purpose did Colonel Menendez leave the house at midnight? Somnambulism might solve the second riddle, but to the first I could find no answer acceptable to my reason. And now, pursuing my aimless way, I presently came in sight of a gable of the Guest House. I could obtain a glimpse of the hut which had once been Colin Camber’s workroom. The window, through which Paul Harley had stared so intently, possessed sliding panes. ”
