If you've ever lost a piece of mail through the USPS, this story might give you hope that your grandchildren might eventually find out what happened to it.
The USPS recently delivered a letter sent from Montgomery, Alabama, to the Red Cross Hospital at Camp Roberts in California that had originally been sent on Aug. 9, 1944.
Since neither the Red Cross hospital nor the intended recipient — a Miss RT Fletcher — are still around, the letter — still sealed but with a tear in the upper left corner that makes the return address unknowable — was delivered to the curator for the Camp Roberts Historical Museum.
According to the curator, the postal service delivered the letter "just like another piece of mail, with no explanation."
http://consumerist.com/2011/03/usps-delivers-letter-56-years-late.html