The Gift That Keeps on Giving

The phone rang yesterday morning. The name on caller ID was that of an old friend of my Mother's. And my heart sank as I picked up and heard him say he had just found out that Mother had died -- well over a year ago! How had I missed him, in all the morass of Mother's address books? She had so many friends. I felt guilty and apologized profusely. He was not upset in the least and accepted that people get left out unintentionally. Are there more out there?