Possible Clues:

• Keen-eyed old boy and man
• Attentive valet supports old bachelor
• Being a spotter of talent, he passed on help
• Odd characters in book turning page practising religion
• Sharp over bowled at Cook by way of an example
• Watchful attendant behind old boy
• Brave's not exceptionally orthodox
• Alert
• Noticing old book with Jeeves, say
• Noticing bachelor following old maid, say