In 2002, a woman named Fawn Fitter bought box of old letters, photos, and related memorabilia from a flea market vendor. She soon realized she'd stumbled upon the chronicle of one family's life, beginning with a series of 1940s love letters documenting the courtship of the man and woman who formed the family's foundation.
Fitter decided to track down the family and was surprised to discover that the man who wrote the love letters was still alive. The family welcomed her inquiries and she soon became the family's de facto historian, or even something like an unofficial family member.
All of this, and much more, is explained in greater detail in this excellent article. Fitter is also documenting her research on this blog. It's all very, very Permanent Record, and highly recommended.
(Special thanks to my friend Gina Duclayan — at whose 1996 birthday party I found the Manhattan Trade School report cards that formed the basis for Permanent Record! — for tipping me off to this one.)