Mahoney, from the Bowery in New York is rescued by the McCains, given refuge, food and a job. Having sufficient money, he continues on his way with another stagecoach. But the driver is discovered to be a thief at the next way station, and kills his accuser – and goes after Mahoney.
Mark hears Mahoney's story, believes him and tries to hide him. Taking him into the backwoods, he leads Mahoney through a number of efforts to hide their tracks (an episode I remember clearly from when I was a kid). Lucas and Micah, with a large posse also searching, go after him – but so does the killer. Lucas appreciates the tricks Mark has employed, but also sees through them.
This is a very good, tight story, with a good climax.