Possible Clues:

• #The way one sang into Edward
• Recited almost monotonically
• Sang a canticle
• Chanted one not unfamiliar to boy
• Said flatly: 'Very interested in new edition'
• Sang in church, being enthusiastic about new English doxology's introduction
• What got into Edward to have sing like that?
• This made the sound that was not out of Edward
• If you were so vocal, that would get it into the boy
• Not out of Edward, by the sound of it