Final answer:
Stapleton can cross the Grimpen Mire by knowing the safe paths, allowing him to conduct criminal activities undetected.
Step-by-step explanation:
The question pertains to a character named Stapleton from the novel “The Hound of the Baskervilles” by Sir Arthur Conan Doyle.
In the story, Stapleton explains that he is able to cross the Grimpen Mire, a dangerous bog, because he knows the safe paths which are not obvious to outsiders.
He does so in order to manage his criminal activities without being detected, as the dangerous mire discourages others from following or observing him.