Doc Halfhand finishes his conversation with Captain Halehearty, and when the ship is empty, riding higher than it had been when it had been moored, he leaves him and returns to the prison. Halehearty chooses to stay with his ship. "Are you sure?" asks Doc. "You're not concerned about another attack?" But for now the captain stays.
And so it is only Doc and the lift operator as he begins the slow ascent to the prison. The light is drawn from a low winter sun, and seems to catch on where the giant crab's pincers had pressed into the soft stone, immediately above where its corpse can still be seen below.
When he gets to the prison, Doc checks in. Security seems tight, but he is a known face, and he can trust he'll be given a meal if he asks for one. With the new faces, he has nothing to do and doesn't want to be in the way. He'll eat, introduce himself to the new doctor (whose presence will reduce the need for him at the prison), and touch base with the warden.
He ensures the warden has a means of contacting him (he's used skywriting in the past, but Doc doesn't see the wizard who knew that spell, and perhaps he is no longer on staff) in case emergency food is required. After that, he will plan to return to the tundra, so that he can check his trapline.
[any of this of course might be interrupted at any time]