What makes Jemmy realize that the two bandits have been having a hard time?

Jemmy realizes that the two bandits have been having a hard time when he observes their ragged appearance and worn-out demeanor, indicating the toll of their criminal lifestyle. Their desperation becomes evident through their interactions and the way they discuss their plans, revealing a sense of frustration and exhaustion. Additionally, Jemmy notices their lack of confidence and the fear underlying their bravado, which further highlights their struggles.