Inside he finds himself opposite of a sturdy stone wall, full of arrow slits. The lord of the fort did not leave it to chance what happens if attackers get through the gate.
To the west, there's a brick wall, which has several irregular-shaped holes in it, but otherwise intact, all along the wall. Behind and above it is the west wall. It has two doors, one wide open, while the one to the north is really just a big doorway. The door itself cannot be seen. Between the two doors is a large well, at the base of the north wall there's a cart and a big haystack, surrounded by dropped tools.
The little Abe can discern from the east part is it's much cleaner and better maintained. And the only light comes from there, probably torches by its flickering and color.

A: Abe
G: guards