Possible Clues:

• Dreary routine at first to study On Liberty?
• On this, exercise is routine drudgery
• Winger's notes about badly made exercise machine
• Time to study philosopher in dreary routine
• Time to study English philosopher -- dull work
• Trainer's first to look at factory's exercise equipment
• Hard drudgery mild later perhaps
• Exercise machine reforming team drill
• Routine quavering made in warble
• Time to study factory's routine