Chapter II: 
 “"Well played, sir!” when they meant “’at-a-boy!"”
  “mean” is in the US edition; other editions have “meant”.

Chapter VI: 
 “Regent’s bill-of-fare” has been corrected from “Regent’s bill-of-fair”
  in the US edition. “pull some boner” has been corrected from “pull some bone”
  in the US edition.

Chapter VIII: 
 “Before his stony eye the immaculate Bartling wilted. 
 It was a perfectly astounding likeness, but it was apparent to him when what he had ever heard and read about doubles came to him.”

This is a somewhat clumsy construction, and quite un-Wodehousian.  The original passage in the serialization read: 

 “Before his stony eye the immaculate Bartling wilted.  All that
 he had ever heard and read about doubles came to him.”

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