I remember reading this story in 2011 when it was first published in the New York Times. It's such a good story, though, so moving and real, that I like to go back from time to time and read it again.
It's all about a wallet that was lost in about 1970 in New York City and then unexpectedly found, sealed away behind some masonry, just over forty years later. Not long afterward, it was restored to its original owner. What affects me the most, I think, is reading about how emotional a moment it was for that man when he first took hold of the wallet again, with all its thirty-year-old memories suddenly reawakend.
This page at the New York Times site also has a short video that shows both the place where the wallet was hidden away in the old Times building and also the man's reaction when it is first handed back to him.