And just why is ...?

Here are some rather more obscure puzzles than normal to keep you thinking:

• Whose childhood toy is Cuthbert?
  
• Who's the snugglepuss named after?
  
• Who was Captain Colin?
  
• Just why is Richard likened to the canary?
  
• Who was murdered in the Olive Grove?
  
• Why was the Irish puzzle removed from the mausoleum?
  
• Where can a map of the scriptorium be found outside of the game?