J. S. Fletcher,
The Markenmore Mystery — Chapter 16
(1923)
“ These primeval works, grown over in course of time, were danger-traps for the unwary who wandered through the backwoods or crossed the rough, unfrequented parts of the uplands; more than once, in Mr. Fransemmery's short experience of Markenmore, he had known of man or horse falling into some unexpected cavity. Some such accident as this he conceived to have been possible in the present instance, and when he heard of von Eckhardstein's disappearance, he took his stoutest walking-stick, some lunch in his pocket, and a small flask of brandy and water, and set out to prospect. ”
