Theirs may pair off with that prodigious woe
Imagined of a ghastly brotherhood—
One watcher left in lighthouse out at sea,
With leagues of surf between the land and him,
Alive with his dead partner on the rock;
One galley-slave, whom curse and blow compel
To labor on, ply oar—beside his chain,
Encumbered with a corpse-companion now.
Such these: although, no prisoners, self-entrenched,
They kept the world off from their barricade.