The star praises a fan's "act of grace" after he is reunited with a very valuable briefcase after 23 years apart...

A long-lost briefcase full of notes and lyrics that were intended for the 1981 U2 album ‘OCTOBER’ has been returned to the band’s frontman BONO.

The star commented on its’ return during an appearance before the World Affairs Council of Oregon on Wednesday (October 20), saying the returned notes were “an act of grace”.

Bono had to rewrite his lyrics for the ‘October’ album in the studio after his case was stolen backstage at a concert in Portland.

ABC reports the briefcase was returned by Cindy Harris, 44, who said she found it in the attic of a rental home in Tacoma, Washington, in 1981. She said she did not know the notes had been stolen until many years later, and then she had no idea how to reach the band.

Her friend Danielle Rheaume spent much of the past year atttempting to contact the band’s management witha view to returning the briefcase to its’ rightful owner.

The band returned to Portland a few years after the theft and Bono asked the audience if anyone knew about the briefcase. He repeated the question when the band played at the Rose Garden arena in 2001.

U2 release their new album ‘How To Dismantle An Atomic Bomb’ on November 22.