On the first level, go north-west to the hole at 1 in the big hall, to descend to level two. There, go north-east to the hole at 2 to descend to level three. On this level, go to the south-west to find the hole at 3 to enter the final level. Go to the chamber of the ant queen at 4 but don't kill her (karama loss otherwise). Only kill the guards and then find Ol' Hawknose's body with the map on it.