After defeating Lleviathan and receiving a Fygg, you can take a boat to Slurry Quay.
Visit Slurry Quay
There isn't much to do in this small town. The item shop closes at night. The nun in the Inn can save your game. Be sure to open up the chest to the east of the Inn to get a Seed of Strength. The other one is locked.
Go southeast from Slurry Quay to reach Dourbridge.