고2 금성 교과서 10과 him 해석 질문

고2 금성 교과서 10과에 나온 문장에서 빨간색으로 표시된 him이 누구를 가리키는지 궁금해요.
심부름 소년이 아니라 제 남동생을 가리키는 이유를 모르겠어요. 제가 해석을 잘못한 걸까요?
아래 문장 흐름도 함께 봐주시면 감사하겠습니다.
“How?” he asked quietly. “Well, he called a firm that hired out messenger boys, and asked them to send one to meet him on a street corner.”
“He gave the boy the package of a messenger boy money and paid him to take it back to the owner. The owner was happy about the swift recovery, and my brother was off the hook.”
“Is that right?” replied Pat and stood up. And that was the last thing he said all night.