There were all sorts of Christopher Robin verses (some not written by A A Milne). I have a vague school time memory of one with "lily white fingers carressing his hairs" instead of the "hush, hush, whisper who dares, Christopher Robin is saying his prayers".Strangest thing of all is I believe that the real life Christopher Robin (A A Milnes son - I think) was in fact an athiest.
Re the Buckingham Palace bit my memory only goes this far:
They're changing guards at Buckingham Palace
Christopher Robin went down with Alice
Alice is marrying one of the guards
"A soldiers life is terribly hard" , said Alice.Jon