The Pathfinder is comprised of two clearly defined parts, each developing an adventure in which Mabel is endangered, Hawkeye and Chingachgook come to the rescue, and James Western proves his bravery and skill. But both sections also develop the theme of Natty's growing interest in the girl and his resulting distraction and failures which are a result of letting considerations of infatuation and love override his habitual caution. Because he is spending time with Mabel instead of guarding the fort, Arrowhead and Sanglier succeed in approaching the garrison, where they plot with Lieutenant Muir. As Jasper tells his friend, if he "had been outlying that night, as usual, we would have secured one if not both of them." Later, Sergeant Dunham blunders into an ambush and loses his life because, as Natty states, "if I had stayed with the boats, this would not have come to pass." He...