The rats are like fingers.
No. That’s not right. Fingers can reach out, can grasp and extend. The rats are not like fingers at all. They are periscopes, like those on submarines, each able to give its captain only a limited view of the world above. From their place below, among the dead, the lost ones can see only as far as the rats can see. But they are patient, and so they wait. And they let the rats run.