Final answer:
Based on the given information, it is impossible to determine who is ultimately responsible for leaving baby Jack in the handbag.
Step-by-step explanation:
Based on the given information, it is unclear who is ultimately responsible for leaving baby Jack in the handbag.
The passages provided do not present a clear scenario where someone leaves the baby in the handbag. It seems to be a question of responsibility that is left open-ended for interpretation.
Without more specific context or information, it is impossible to determine who is ultimately responsible for leaving baby Jack in the handbag.