"What is he like?  Is he big?"

  "He is not so big as he was."

  "How do you mean?"

  "I cut off a bit of him."

  "You!"

  "Yes, me," said Peter sharply.

  "I wasn't meaning to be disrespectful."

  "Oh, all right."

  "But, I say, what bit?"

  "His right hand."

  "Then he can't fight now?"

  "Oh, can't he just!"

  "Left-hander?"

  "He has an iron hook instead of a right hand, and he claws with

it."

  "Claws!"

  "I say, John," said Peter.

  "Yes."

  Plus loin : « and instead of a right hand he had the iron hook with which

ever and anon he encouraged them to increase their pace. »  

Donc, il semble a priori droitier mais sa main intacte est la gauche,  c’est sûr et certain.