Chapter 4: Close to the Edge, pp. 160-173 Summary

About 70 miles away from the Rim, a slave ship drifts through the water. Having recently rescued Rincewind, Twoflower, and the Luggage from drowning in the Circle Sea, the ship is now battling the Luggage, which has attacked several crewmembers that have attempted to inspect it. The first mate runs to the ship's captain and tells him the raft is ready. The captain orders the crew to put the raft in the water and get inside, then set the ship on fire. They are eager to escape the Luggage at all costs.

Twoflower and Rincewind's boat has hit the Circumfence, a fence made of ropes and wooden posts that goes around the Edge of Discworld. Tethis, a sea troll, rescues them in his boat, which moves along the ropes by way of...