Read the following extract which describes the Hulks (the prison ships) as Magwitch is taken back to them after his recapture. Then answer the questions which follow.
The boat had returned, and his guard were ready, so we followed him to the landing-place made of rough stakes and stones, and saw him put into the boat, which was rowed by a crew of convicts like himself. No one seemed surprised to see him, or interested in seeing him, or glad to see him, or sorry to see him, or spoke a word, except that somebody in the boat growled as if to dogs, “Give way, you!” which was the signal for the dip of the oars. By the light of the torches, we saw the black Hulk lying out a little way from the mud of the shore, like a wicked Noah’s ark. Cribbed and barred and moored by massive rusty chains, the prison-ship seemed in my young eyes to be ironed like the prisoners. We saw the boat go alongside, and we saw him taken up the side and disappear.
Which of the themes of the novel is Dickens highlighting in this extract?