After speaking, Arthur extended his pinky finger towards Pinkerton, who initially paused in confusion but then remembered the life stories of Arthur shared by Officer Tom in the past few days, and suddenly felt a surge of courage filling his fearful heart.
Pinkerton also extended his pinky and hooked it gently with Arthur's, their thumbs pressing hard together. In the innocent acts of children, this signified that their pact had been officially sealed.
Removing the new felt hat that Arthur had just purchased for him, Pinkerton's face beamed with a smile, "Sir, I trust you."