 And it was either postmasters ignoring the rules, because remember, they were very far away from Washington, D.C., so they didn't always feel like they had to obey every single rule every single time. September 1915 is the last known instance of a child being mailed. Three-year-old Maude Smith, she went on her parcel post journey. And again, she traveled from her grandparents' home to her mother's home.