"Mother of Pearl" (2010)
“Mother of Pearl” is a title of a demo being developed during the sessions for No Line on the Horizon and possibly later for Songs of Ascent.
“Mother of Pearl” is a song which Bono played for Dutch author Bert van de Kamp, which he speaks about in his book And They Called Him Bono. The author spoke with Bono in 2009, and met with the band in 2010, and the book was released in 2010. The other song mentioned in this book is “The Sacred Heart of Malibu”. A third song was played but is not named in the book.