In late July this year, Jim Wirth was sweeping the area of Cape Cod with a metal detector when he came across a gold ring. "When I first got it out of the sand and rocks, it was very dark in colour and had a green crust," says Mr Wirth to NDTV.
He got it home, cleaned it up and discovered that it was a 1969 college ring from Manhattan College.
"It had a full name inside, Patrick F. O'Hagan," says Mr Wirth.
"I knew I had the right person," says Mr Wirth when he came across a chapter in the memoir where Christine talks about falling in love with Patrick O'Hagan at Manhattan College.
"Oh my God. Oh my God you're kidding, that's what I said to him," says Ms O'Hagan, according to the NBC. "I always looked for it, it was like a piece of our early years."
The ring, cleaned up, was returned to the couple just a few days later.