Leticia Gonzalez had her 4-year-old twins, Luna and Gianella, write letters to Santa and attached them to balloons, sending them off into the sky. About a month later, a grandfather living more ...

Balloon Jupiter had to land after 30 miles; its mail (here) was sent on by train. National Postal Museum If you happened to be a child in the New York City of 1859, awaiting a birthday letter from ...