Possible Clues:

• An absence of famous Edward
• It's well-known that when the boy isn't there, his IOUs aren't tedious
• Observed the famous
• Never a famous Edward
• Was aware of
• Celebrated or recorded
• It's well-known that this isn't the editor
• Seems that there isn't any such a famous Edward
• How tedious that if the boy was gone like this you'd be left with only the IOUs!
• Scored and made a record