How do I find the caverns of Labion

Hint 1 of 4:

Were there any gaps in your searching?

Hint 2 of 4:

Do you recall the chasm?

Hint 3 of 4:

Did you take the rope from the rock by the unconsious hunter?

Hint 4 of 4:

Tie your rope to the center of the log, and climb down.