The tattered envelope and letter shown above date back to February of 1963. They were recently found under the seat of a rusted-out, rodent-infested 1959 Chevrolet Bel-Air that was purchased at auction by an Indiana man named Dean Sparks.
Sparks was intrigued by the letter, which had been written by a young woman to her sweetheart. The last line, underlined, said, "Let's get married."
After a bit of internet research, Sparks was able to connect with a Kansas man named Wade Waterbury — the son of the woman who'd written the letter. She and her beau had indeed gotten married, just a few months after the letter had been written. In fact, they eloped in that ’59 Bel-Air that Parks eventually purchased. Unfortunately, both of them are now deceased, but Parks sent the letter to Waterbury, who was excited and somewhat emotional to receive this unexpected family keepsake.
It's a great story. You can read more about it here, and there's some additional info in these two video reports (there's some footage that's used in both of them, but they both have a few unique bits that are worth seeing):
(Big thanks to reader James Poisso for letting me know about this one.)