Go to chapter 4. The Seat of Judgement.
Let us all stand very stiffly! And then let us box stiffly!
Wouldn't the quiet way of getting rid of him involve slitting his throat? This is the jungle, not a vet's office. The Adam West Batman is a very direct descendent of this. Not really news to anyone, but the whole gas chamber bit really drives it home, more than "hey look, there's a lion!" or "oh no, a grenade landed on me!" did.